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This is a critical moment in U.S. history, and it demands that we stand strong in our opposition to the administration’s reckless and unlawful use of military force.
For years, we have warned against the danger of an unchecked president turning the military against American civilians.
In an extraordinary show of force, President Trump has federalized 4,000 members of the California National Guard and deployed 300 of them, in addition to deploying 700 Marines, to quell protests in the Los Angeles area. All over the objections of Gov. Gavin Newsom.
Why this abrupt, camera-ready escalation? White House Deputy Chief of Staff Stephen Miller posted a video of a peaceful protest parade. “If we don’t fix this, we don’t have a country,” he shuddered. “Pass the BBB” — the budget bill now facing turbulence in Congress.
Trump’s administration is spoiling for a fight. It pops out emergency declarations like a Pez dispenser. It is also relying on flimsy legal justifications, as my colleagues have pointed out.
Presidents have deployed troops to control civil unrest only 30 times before in U.S. history. The Posse Comitatus Act generally prohibits federal troops from engaging in civilian law enforcement. Soldiers are trained to defeat an enemy, not to de-escalate protests.
The situation in Los Angeles is bad. What might come next could be worse.
The last time that a president sent in the Guard without a clear request from a state’s governor was 1965, when troops were used to protect the voting rights march from Selma to Montgomery. (And even in that case, George Wallace waffled.)
To be clear, violent protests are not acceptable or productive. The federal government should be unobstructed in carrying out its lawful duties. Of course, the specter of masked ICE agents lurking in the lobbies of immigration courts, as has happened here in New York City, is itself willfully provocative.
In fact, in Los Angeles, protests have been overwhelmingly peaceful. The LAPD — hardly a department of pushovers — has been adamant that it has the situation under control. Not surprisingly, the troops have only fanned the protests. Newsom formally requested that the administration rescind the deployment, saying that it is “inflaming tensions while pulling resources from where they’re actually needed.”
The situation in Los Angeles is bad. What might come next could be worse.
Trump’s executive order authorizes deployment of the Guard “at locations where protests against [ICE] functions are occurring or are likely to occur.” Where might that be? “We’re gonna have troops everywhere,” Trump declared.
As my colleague Elizabeth Goitein notes, “No president has ever federalized the National Guard for purposes of responding to potential future civil unrest anywhere in the country. Preemptive deployment is literally the opposite of deployment as a last resort. It would be a shocking abuse of power and the law.”
The most powerful repressive tool would be the Insurrection Act — a law that lets presidents deploy troops to suppress a rebellion or insurrection or curb domestic violence in extreme scenarios. Trump threatened to invoke it against Democratic-run cities during his 2024 campaign.
The Insurrection Act is, unfortunately, a mess of a law. Key words such as “rebellion” and “insurrection” are left undefined. Courts have given presidents a wide berth. Trump winked at this law by calling the protesters “insurrectionists.”
He has so far chosen to rely on a different law — one that has never been used to quell civil unrest without an accompanying Insurrection Act invocation. The administration claims that it is invoking this law only to protect federal personnel and property. But Homeland Security Secretary Kristi Noem has requested that soldiers be authorized to detain and search protesters, functions normally prohibited by the Posse Comitatus Act.
It’s clear that Trump wants to use this showdown to expand enforcement powers.
The week before he stages a strongman-style military parade along the National Mall — complete with tanks, missiles, and military aircraft — Trump has claimed the right to preemptively authorize deployment of the military all across America.
That should be chilling to most Americans, who have enjoyed a firm line between police and the military as an essential component of our democracy. The deployment of the military against civilians should only be used in the most extreme cases as a last resort. Otherwise, as Elizabeth Goitein notes, “an army turned inward can quickly become an instrument of tyranny.”
Experts have already identified worst-case scenarios. George W. Bush administration official David Frum has sounded the alarm on the possibility of Trump using the military to influence the 2026 election.
If you want to learn more about all of this, here are reports we’ve published in the last few years on emergency powers, the Insurrection Act, the Posse Comitatus Act, the Alien Enemies Act, and martial law.
Once again, in the face of a lawless executive, the courts must now step up. The Supreme Court may want to avoid a conflict, but here, it may have no choice. It is imperative that it uphold checks against the use of military force against civilians.
And now that we know that the existing laws can be used, however tendentiously, to justify provocative military action, we must fix those laws so they cannot be abused again.
The Brennan Center has proposed reforms to the Insurrection Act, including defining the law’s critical terms and enforcing more checks on its use. We have also proposed reforms to strengthen the Posse Comitatus Act. Americans must be adamant, too, that even under existing statutes, presidents lack the power to declare martial law.
This is a critical moment in U.S. history, and it demands that we stand strong in our opposition to the administration’s reckless and unlawful use of military force, in Los Angeles and across the country.
Is the Court under Chief Justice Roberts more conservative than its predecessors?
Rulings issued by the Supreme Court of the United States (SCOTUS) increasingly appear to be ideologically driven, often splitting along a clear conservative-liberal divide—whether 5–4 when there were five conservative justices, or 6–3 following the death of Ruth Bader Ginsburg and her replacement by the more conservative Justice Amy Coney Barrett, appointed by President Trump. The relatively recent Dobbs v. Jackson Women’s Health ruling in June 2022, where the conservative majority overturned Roe v. Wade by a 6-3 split, underscores this point.
This pattern of partisan alignment contributes to a broader fear, especially in the wake of President Trump’s reelection, that America’s bulwarks of democracy are buckling. From attacks on civil rights, universities, and the press, to a Justice Department willing to arrest sitting judges, Trump’s actions seem designed to destabilize core institutions. At the same time, his roughshod approach to “justice” is almost cynically expected to end up in the courts—particularly at SCOTUS—where many assume the ruling will go his way. The common narrative in progressive circles warns that the Court, stacked with Trump appointees, will support him in any unconstitutional attempt to hold power. While we have no quibble about their assessment that President Trump is a bad hombre who will do his best to do his worst, we are not convinced that SCOTUS will ever do his bidding. And though three of its justices were appointed by Trump and others often align ideologically, SCOTUS has shown itself, at times, to resist political pressure. It may still serve as a vital check on executive overreach. Whether it can fulfill that role is a question worth answering not just with alarm, but with close attention to facts and patterns. But first, some context and examples.
Recall that SCOTUS dismissed Texas v. Pennsylvania in December 2020 because Texas lacked standing in how Pennsylvania (but also other states) conducts its elections. The unsigned order stated: “Texas has not demonstrated a judicially cognizable interest in the manner in which another State conducts its elections.” No Justice supported Texas’s request for relief, though Justices Alito and Thomas would have allowed the complaint to be filed. SCOTUS rejected or refused to hear all other major legal challenges by Trump or his allies to the 2020 elections. This is despite the 6-3 conservative majority in the Court.
Similarly, there are other examples too, and not just those related to elections, that don’t fit the narrative that the three new Justices nominated by Trump will upend all the civil rights, due process, or other liberties we enjoy. Take Bostock v. Clayton County (2020), a landmark civil rights case where, in a 6-3 ruling, the Court ruled the Civil Rights Act protects employees against discrimination based on sexual orientation or gender identity. The majority opinion was written by Justice Neil Gorsuch, a Trump appointee, and while dissenting justices Alito, Thomas, and Kavanaugh are also conservatives, Justice Kavanaugh wrote a separate dissent arguing it should be Congress and not the courts that should add gender and sexual orientation to Title VII. He stated,
“Millions of gay and lesbian Americans have worked hard for many decades to achieve equal treatment in fact and law ... They have advanced powerful policy arguments and can take pride in today's result. Under the Constitution's separation of powers, however, I believe that it was Congress's role, not this Court's, to amend Title VII.”
A different kind of example is the Sackett v. Environmental Protection Agency (2023). Here, the Court significantly limited EPA’s authority to protect certain wetlands under the Clean Water Act, which has serious environmental implications. Notably for our purposes, this conservative ruling was unanimous (9–0), though the justices differed in their reasoning.
So what should one make of these mixed examples? Is the Court under Chief Justice Roberts more conservative than its predecessors? Has it become more conservative since the appointment of the three justices by President Trump, and if so, in what type of cases? And what about ideological splits like 5-4 or 6-3, have they increased over time?
Data. Fortunately, the publicly available Supreme Court Database (SCD), hosted by Washington University in St. Louis, allows researchers to explore precisely these questions. The current version of the database includes all Supreme Court cases from World War II to July 1, 2024 (with an extended version covering decisions from four centuries ago) and classifies each ruling as liberal, conservative, or “unspecifiable”. For example, a decision is coded as liberal if it favors minorities in civil rights cases, supports the defendant in criminal cases, rules against the government in due process cases, or sides with labor over business in union-related disputes. Occasionally, this can give a counterintuitive classification; in Trump v United States (2024), the SCOTUS ruled 6-3 in favor of the individual and is thus coded as ‘liberal.’
Importantly, the SCD also records each justice’s vote, the breakdown of majority and minority opinions, and categorizes the main legal issue using a detailed taxonomy of 271 issue codes (e.g., habeas corpus, antitrust, abortion, torts, privacy) as well as 14 broader issue areas (e.g., Criminal Procedure, First Amendment, Civil Rights, Economic Activity, Due Process). Although there can be occasional misclassifications given the database’s scale and complexity, it is considered comprehensive and is widely used by legal scholars. The database includes 9,277 cases, with only 64 (0.69%) lacking an associated issue.
Robert’s Court. How do SCOTUS decisions under Chief Justice Roberts compare with those of his predecessors? Ignoring unspecifiable cases and coding liberal as 0 and conservative as 1, the average under Roberts is 0.532—meaning 53.2% of cases are conservative. This figure is similar to those from earlier courts: Vinson (49.7%), Berger (54.8%), and Rehnquist (55.2%), with none statistically different from Roberts’ 53.2%. (See Table 1 below.)
Only the Court of Warren, with an average of 32.8% (appointed by Eisenhower, who later called Warren “the biggest damn-fool mistake I ever made”), stands out as markedly liberal, as seen in landmark decisions such as Brown v. Board of Education (1954) which declared racial segregation in public schools unconstitutional, or Gideon v. Wainwright (1963) which guaranteed the right to a lawyer in criminal cases, or Miranda v. Arizona (1966)which required police to inform suspects of their rights (Miranda rights) or Loving v. Virginia (1967) which struck down laws banning interracial marriage. Overall, aside from Warren’s Court, the decisions do not appear radically more conservative.
Trump I’s Nominations. Has SCOTUS become more conservative since the nominations of Justices Gorsuch, Kavanaugh, and Barrett? To check this, we focused on cases decided after Roberts became Chief Justice on October 29, 2005. We partitioned these into two groups: cases decided before April 10, 2017 (the swearing-in date of Justice Gorsuch) and those decided after October 26, 2020 (the swearing-in date of Justice Barrett). We discarded cases between these two dates and those before Roberts took the bench. After removing cases where the issue was not specified or the decision wasn’t coded as liberal/conservative, our sample consisted of 1,128 cases—894 from before any of Trump’s nominations and 234 from afterward.
The good news is that his nominees have not overwhelmingly swung the Court towards conservatism. About 52.68% of decisions were conservative before the nominations, with a further 4.5% increase after—but this change is not statistically significant.
By Issue areas. Although there is no overall change, it still ‘feels’ as if something is amiss—perhaps because we value certain types of cases more highly. Since assigning weights to cases is complex, we next examine changes by issue area as defined in the data. We summarize below the baseline percentage of conservative decisions by issue and the percentage change after the three justices were sworn in.
Most changes are small and not statistically significant. However, two issue areas stand out. For “Due Process,” conservative decisions rose from 18.2% to 70% (an increase of 51.8% and statistically significant). For “Unions,” conservative decisions drop from 60% to 27.3% (a decrease of 32.7%, also statistically significant but not as strongly). These areas—among several others—often involve relatively few observations, which may affect statistical significance.
Liberal/Conservative Splits. We also examined the margin by which majorities prevail—whether decisions occur as 5-4 or 6-3 splits. First, as the proportion of votes in the majority, which range from 50% to 100%, has crept upward over time, consensus has slightly increased. This change is small yet statistically significant. The figure below shows the mean values for majority vote by year as well as the mean of (logit) fitted values.
Second, we assessed whether the share of cases decided by a 5-4 or 6-3 split has changed from before to after Trump’s nominations. This is tricky though, as a 5-4 or 6-3 split does not necessarily mean that the conservative Justices strongarmed their way, as splits can be with a liberal decision too. For example, in June 2012, SCOTUS ruled in a 5-4 split that the individual mandate under Obamacare was constitutional, where Chief Justice Roberts argued the mandate was essentially a tax, a power granted to Congress. Similarly, in Moyle v. United States (2024), three conservative justices — Roberts, Kavanaugh, and Barrett — joined with the liberal justices in a 6-3 decision upholding a lower court injunction preventing Idaho from enforcing its abortion ban in emergencies. But also recall that the 6-3 split in favor of President Trump in the criminal case of Trump v United States is coded as a liberal decision.
As Table 3 shows, about a quarter of cases during this period resulted in 5-4 or 6-3 splits, and such split decisions increased from 23.4% to 29.8%. But when we disaggregate the split cases by liberal or conservative decisions, there is a 12.5% statistically significant increase in split cases when the decision is conservative but not when it is liberal (we also tested this in a probability model for split decisions while controlling individual justice fixed effects with very similar results).
Final thoughts. One important caveat is that the data does not reveal which cases SCOTUS chooses to hear. Nonetheless, the impact of the three Trump nominations on the cases heard has been negligible regarding overall conservative rulings. This is not to say that the new Justices are not conservative or not likely to vote conservatively; rather, it indicates that the Court's overall posture has not radically shifted compared to recent periods. We may take some comfort in that, though we must remain vigilant.
Democracy and justice cannot be taken for granted. Ultimately, while conservative decisions today are more likely to be split along ideological lines, it remains an open question whether this is due to conservative justices imposing their views, liberal justices being more stubborn, or due to the nature of the cases heard by the Supreme Court.
One immigration lawyer wrote that the order "simply ignores the human costs and blesses the Trump admin's stripping of status of hundreds of thousands of people who entered the country legally."
The U.S. Supreme Court on Friday cleared the way for the Trump administration to end, for now, legal protections for more than 500,000 Haitian, Cuban, Nicaraguan, and Venezuelan migrants with a ruling that liberal Supreme Court Justice Ketanji Brown Jackson blasted in a dissent as deeply harmful.
The decision puts on hold a ruling from U.S. District Judge Indira Talwani, who in April issued a stay on the Trump administration's move to end a humanitarian program extended to this group under former U.S. President Joe Biden. The ruling means the immigrants are at risk of being deported under President Donald Trump's mass deportation effort, even as the core legal issues in the case continue to play out in lower courts.
The unsigned order from the Supreme Court focuses on the so-called CHNV parole program, which allows certain individuals from those four nations to apply for entry into the U.S. for a temporary stay, so long as they have a U.S.-based sponsor, go through security vetting, and meet other conditions. In some cases, beneficiaries of the program work in the U.S.
On his first day in office, Trump issued an executive instructing the U.S. Secretary of Homeland Security to "[t]erminate all categorical parole programs," including CHNV.
"The court has plainly botched this assessment today. It requires next to nothing from the government with respect to irreparable harm" wrote Jackson in her dissent, joined by Justice Sonia Sotomayor. "And it undervalues the devastating consequences of allowing the government to precipitously upend the lives of and livelihoods of nearly half a million noncitizens while their legal claims are pending."
Friday's ruling is the second time this month that the Supreme Court has permitted the Trump administration to halt a program aimed at protecting immigrants who leave their home countries for humanitarian reasons. Earlier in May, the court issued an unsigned order allowing Trump to cancel Temporary Protected Status protections specifically extended to 350,000 Venezuelans immigrants while the legal case winds its way through lower courts.
The court's decision on Friday is a temporary order and litigation is still playing out, but it signals that a majority of the justices think the Trump administration is likely to prevail in the case, according to The New York Times.
"Respondents now face two unbearable options," according to Jackson's dissent. Jackson wrote that immigrants in the program could either chose to leave the U.S. and potentially confront dangers in their home countries, and other adverse outcomes, or "risk imminent removal at the hands of government agents, along with its serious attendant consequences."
"The court allows the government to do what it wants to do regardless, rendering constraints of law irrelevant and unleashing devastation in the process," she concludes in the dissent.
Aaron Reichlin-Melnick, senior fellow at the American Immigration Council, wrote: "an incredibly devastating decision which simply ignores the human costs and blesses the Trump admin's stripping of status of hundreds of thousands of people who entered the country legally."
Josh Gerstein, a legal reporter at Politico, wrote that the ruling "may spell trouble for Ukrainians/Afghans with similar status."