Sen. Bernie Sanders waves to his supporters following a campaign rally at the Lexington Convention Center on May 4 in Lexington, Ky. | AP Photo Sanders accuses DNC of tipping convention toward Clinton

Bernie Sanders is accusing Democratic National Committee chairwoman Debbie Wasserman Schultz of trying to tip the party convention in Hillary Clinton's favor, saying the chairwoman has packed the committees with Clinton supporters.

In a letter to the chairwoman, Sanders noted that of the 45 names he submitted to Democratic National Convention committees, Wasserman Schultz appointed only three.


"I believe the composition of the standing committees must reflect the relative support that has been received by both campaigns," Sanders wrote in the letter dated May 6. "That was why I was so disappointed to learn that of the over forty people our campaign submitted at your request you chose to select only three of my recommendations for the three standing committees. Moreover, you did not assign even on of the people submitted by our campaign to the very important Rules Committee of the Democratic National Convention."

Sanders said that if the disagreement over convention committee appointments is not resolved, he would have his delegates move to change the platform on the floor of the convention.

"It is my hope we can quickly resolve this in a fair way," Sanders wrote. "If the process is set up to produce an unfair, 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."

Sanders' chances of taking the Democratic nomination have decreased, as he has a deep disadvantage in both pledged and superdelegates. But the insurgent candidate has vowed to continue on, and his deep run into the primary gives him additional leverage to pull the party to the left.

In his letter, Sanders also mentioned the Democratic Party platform drafting committee. In the letter he recounted Wasserman Schultz had discussed changing the process for selecting members of the committee.

"In our conversation, you told me with respect to the platform Drafting Committee that you would consider allowing each campaign to submit ten names from which you would choose four from each and then you would add an additional seven," Sanders continued. "While having four members on the Drafting Committee is an improvement, it does not address the fact that up to this point Bernie 2016 has secured 45% of the pledged delegates awarded. Frankly, we believe that percentage will go up in the coming weeks and, of course, we hope it will end up being a majority."

Sanders argued that each campaign should be able to pick seven members for the committee with the fifteenth member being one picked by both campaigns.

"This process will also ensure that the chairs of the standing committees conduct their proceedings with fairness and transparency," Sanders argued.

In its response to Sanders letter, the DNC released a statement saying both campaigns would be represented at the convention.

"Because the Party’s platform is a statement of our values, the DNC is committed to an open, inclusive and representative process," the DNC said in a statement. "Both of our campaigns will be represented on the Drafting Committee, and just as we did in 2008 and 2012, the public will have opportunities to participate"