The ongoing rift between Democratic elites and Bernie Sanders may come to a head at the convention in July, as the presidential hopeful has promised a \u0022fight\u0022 if the party refuses to include \u0022bold\u0022 progressive initiatives on the Democratic platform.Such a move, the Vermont senator said, would be tantamount to \u0022silencing\u0022 the \u00229 million voters who, during this nominating process, have indicated that they want to go beyond establishment politics and establishment economics.\u0022\u0022If we don’t have the votes to get the nomination, were not going get the nomination. That becomes then the platform fight,\u0022 Sanders told MSNBC\u0026#039;s Rachel Maddow in an interview that aired on Friday, making it clear that his determination to take his campaign all the way to the convention in Philadelphia is about more than winning the presidency.In a letter sent to Democratic Party chairwoman Debbie Wasserman Schultz (D-Fl.) on Friday, Sanders expressed concern that the the key committees charged with laying out the party rules and platform would be \u0022stacked\u0022 with \u0022Clinton loyalists.\u0022According to the letter, Wasserman Schultz chose a scant 3 out of forty people that Sanders had recommended for the standing committees, while not one was chosen for the \u0022very important\u0022 Rules Committee.\u0022If we are to have a unified party in the fall, no matter who wins the nomination, we cannot have a Democratic National Convention in which the views of millions of people who participated in the Democratic nominating process are unrepresented in the committee membership appointed by you, the Chair,\u0022 Sanders wrote.\u0022That sends the very real message that the Democratic Party is not open to the millions of new people that our campaign has brought into the political process, does not want to hear new voices, and is unwilling to respect the broader base of people that this party needs to win over in November and beyond,\u0022 he continued.While a president is not bound to the party\u0026#039;s official platform, as Sanders explained to Maddow, it is intended to reflect the ideals of the voter base.\u0022It does say something, it does reflect what the base of the Democratic party believes should be the future of this country, and I intend to do everything that I can to make that the most progressive document that we possibly can,\u0022 he said. \u0022And I think, by the way, that is the doc that the Democratic grassroots people really want to see.\u0022However, the senator is concerned that party elites are already trying to sideline that point of view. In the letter, Sanders points out that the individuals tapped to lead the Platform and Rules Committees, respectively Connecticut Gov. Dannel Malloy and former Rep. Barney Frank of Massachusetts, have served as \u0022aggressive attack surrogates\u0022 for Hillary Clinton throughout the campaign.Doubting that either will \u0022conduct committee proceeding in an even-handed manner,\u0022 Sanders said that their appointment \u0022suggests the standing committees are being established in an overtly partisan way meant to exclude the input of the voters who have supported my candidacy.\u0022Over the course of the primary contest, the Democratic National Committee has repeatedly been accused of tipping the scales in Clinton\u0026#039;s favor.\u0022It is my hope we can quickly resolve this in a fair way,\u0022 the letter concludes. \u0022If the process is set up to produce an unfair,\u0026nbsp; one-sided result, we are prepared to mobilize our delegates to force as many votes as necessary to amend the platform and rules on the floor of the convention.\u0022The warning comes as Clinton was declared the winner of the Guam primary on Saturday, after Sanders secured an upset victory in Indiana. The two Democratic candidates will next face off in West Virginia on Tuesday, May 10th.