A New Yorker in charge of keeping House Democrats in power in this fall’s midterms now faces a challenger from within his own party.

Bronx-area progressive state Sen. Alessandra Biaggi announced Tuesday her bid to unseat Hudson Valley Rep. Sean Patrick Maloney, who chairs the Democratic Congressional Campaign Committee.

“His behavior, I think, proves to many people that he cares only about one thing. And that one thing is himself and his political power,” Biaggi said in an interview.

Biaggi, like some other Democrats, said she is frustrated with how Maloney handled redistricting, including how he announced where he would run.

Last week, Maloney said he would seek election in the 17th district, rather than the 18th district he currently represents. His home is in the newly redrawn 17th district.

Critics say Maloney put current 17th district incumbent Rep. Mondaire Jones in an uncomfortable position of possibly primarying Maloney or another incumbent in a neighboring district.

“If we have the leaders of this party running away from their own districts because they're afraid of a tough fight, what kind of a message does that send?” Biaggi said.

Unlike Maloney, Biaggi does not live in the redrawn 17th district, though she has indicated she intends to move. Still, local Democratic leaders have their suspicions of Biaggi, including Scott Reing, the chair of the Putnam County Democratic Committee, who is supporting Maloney.

“Not only do I think Sean does a good job, but it seems to me that she’s carpetbagging to take advantage of a perceived slight from the redistricting,” Reing said.

Biaggi faces what is expected to be a difficult fight, given Maloney’s position of power in Congress, chairing House Democrats’ re-election efforts. He also has a much larger war chest.

“Huge advantages. Not only money, but staff resources, access to campaign ads and consultants that may not be so readily available to a primary challenger,” said Casey Burgat, who directs the legislative affairs program at The George Washington University.

Still, Biaggi is no stranger to steep odds, as she is quick to point out. She successfully primaried a fellow Democrat in her race for state Senate in 2018.

Biaggi said she will draw on lessons from that campaign.

“I'm used to being underestimated. I'm used to being outspent. And the way that we won in 2018, is exactly the way that we will win in 2022,” she said.

Maloney’s team sent a statement responding to Biaggi’s announcement, pointing to his record.

“From banning oil barge anchorages on the Hudson River to cleaning up local drinking water, Congressman Maloney has always been there for the Hudson Valley and will continue to be,” a Maloney spokesperson said.