New York Gov. Andrew Cuomo (D) is throwing his weight behind the Democratic National Committee's (DNC) proposal to limit the power of superdelegates in picking future presidential nominees.

Cuomo on Monday sent an open letter addressed to New York state DNC members, urging them to vote in favor of the measure, which has largely been associated with the party's progressive wing.

"This week as you gather in Chicago, the DNC will consider a series of changes to the party's rules," Cuomo wrote. "One rule that is crucial to change is the influence of superdelegates. We are the party of the people and our convention and nominating process need to reflect that. Super delegates undermine that point."

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DNC members are meeting in Chicago this week and proposals to reform the influence of superdelegates in the 2020 presidential primary are a top item on the agenda. Sen. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) has led the push to reduce the power of the superdelegates, elected officials who can vote at presidential nominating conventions every four years.

"The superdelegate system undermines a fundamental principle of our democracy – one person, one vote," Cuomo wrote. "While Superdelegates have not directly affected or altered the outcome of our nominating process, they raise concerns of institutional bias and the legitimacy of our party's electoral process."

Cuomo's declaration comes as he is facing a challenge from the left by longtime activist Cynthia Nixon in his reelection campaign for governor. Nixon, a former television star and self-described democratic socialist, has run a progressive platform as she seeks to align Cuomo with the Democratic Party's establishment.

Sanders has led the push for superdelegate reform, claiming he could have won the 2016 presidential nomination if superdelegates had not flocked to Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE. Clinton collected 544.5 superdelegates while Sanders only received 44.5.

Congressional Black Caucus Chairman Cedric Richmond Cedric Levon RichmondRep. Bill Pascrell named chair of House oversight panel Rep. Cedric Richmond set to join House Ways and Means Committee Biden campaign ratchets up courting of Black voters, specifically Black men MORE (D-La.) last week said the proposal could disenfranchise members of Congress.

“Passage of the reforms in their current form would disenfranchise elected officials for no substantive reason and would create unnecessary competition between those elected and their constituent,” Richmond wrote in a letter to DNC Chairman Tom Perez Thomas Edward PerezClinton’s top five vice presidential picks Government social programs: Triumph of hope over evidence Labor’s 'wasteful spending and mismanagement” at Workers’ Comp MORE.