Donald Trump is already laying the groundwork for a second bid for the White House, but a new survey shows the deeply unpopular president losing big time in hypothetical match-ups against a number of other potential 2020 presidential hopefuls.

Against Sen. Bernie Sanders (I-Vt.), Trump loses by a 13-point margin—51 percent to 38 percent—Public Policy Polling (PPP) found. Trump would also suffer a double digit loss against former Vice President Joe Biden, trailing the Democrat 39 to 51 percent.

He'd also lose against Sen. Elizabeth Warren (45 percent to 40 percent) and Dallas Mavericks owner and billionaire Mark Cuban (42 percent to 38 percent). Against Sens. Cory Booker (D-N.J.) Richard Blumenthal (D-Conn.), he'd come out losing again 42 percent to 39 percent).

Another finding from the new poll: a plurality of voters support impeaching Trump—48 percent say he should be impeached compared to 41 percent who oppose it. PPP notes that it's the fourth month in a row a plurality of survey respondents voiced support for his impeachment.

And while Trump's continued his attacks on the media, saying Tuesday in Phoenix that journalists are "very dishonest people," the poll shows the public with far more trust in major corporate media outlets than in the president.

That's true of CNN (50 percent to 35 percent); NBC (53 percent to 35 percent); ABC (53 percent to 35 percent); CBS (53 percent to 35 percent); The New York Times (53 percent to 36 percent); and The Washington Post (51 percent to 36 percent).

Despite his consistently low approval ratings, a majority of Republicans—57 percent—say they want Trump to be their party's nominee again in 2020.

The poll of 887 registered voters was conducted August 18-21, 2017 and has a 3.3 percent margin of error.