Rep. Kyrsten Sinema (D-Ariz.) said she will not vote for Senate Minority Leader Charles Schumer Chuck SchumerCruz blocks amended resolution honoring Ginsburg over language about her dying wish Senate Democrats introduce legislation to probe politicization of pandemic response Schumer interrupted during live briefing by heckler: 'Stop lying to the people' MORE (D-N.Y.) if she is elected to the upper chamber, according to Politico.

“I am not going to vote for him,” Sinema told the news outlet, making her the first Senate candidate to publicly come out against Schumer.

The Senate doesn't hold public votes for caucus leadership, which are worked out in closed-door meetings.

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Sinema’s comments come amid a growing debate over the future of the Democratic Party, with critics slamming Democratic leadership for being out of touch.

Some Democratic House candidates have recently said they won’t vote for House Minority Leader Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE (D-Calif.).

Last week, Pelosi defended current Democratic leadership while fielding questions about New York House candidate Alexandra Ocasio-Cortez’s upset win over incumbent Rep. Joseph Crowley (D-N.Y.), whom some had floated as Pelosi’s successor.

"They made a choice in one district," Pelosi said following the election. "So, let's not get yourself carried away as an expert on demographics and this or that within the caucus or outside the caucus."

Sinema in 2016 voted against Pelosi.

Schumer backed Sinema’s campaign early on, telling her before she announced her campaign that he would support her over other primary candidates.

Sinema would be Arizona’s first Democratic senator in 30 years. She is running to replace Sen. Jeff Flake Jeffrey (Jeff) Lane FlakeHow fast population growth made Arizona a swing state Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Republican former Michigan governor says he's voting for Biden MORE (R), who is retiring at the end of this Congress.

Her campaign has frequently revolved around her centrist policies and resistance to the Democratic Party’s status quo.