House Minority Leader Hakeem Jeffries (D-NY) appears to be gaining a primary challenger: a progressive ally of New York City Mayor-elect Zohran Mamdani who may be the Democratic leader’s first real competition in over a decade.

Chi Ossé, 27, a New York City Council member, filed paperwork with the Federal Election Commission on Monday for “Chi Ossé for Congress” in New York’s Eighth Congressional District. Ossé, who is to the left of Jeffries politically, is one of many progressive challengers looking toward the 2026 midterm elections to oust establishment incumbents and break up the status quo on Capitol Hill.