City Comptroller Brad Lander is preparing to challenge Rep. Dan Goldman for his seat in Congress, sources told NY1.

Lander previously served as a councilman representing Park Slope in Brooklyn and is a notable progressive in the city.

He also ran for mayor and finished third in the Democratic primary, behind Mayor-elect Zohran Mamdani and former Gov. Andrew Cuomo.

During the primary race, Lander and Mamdani cross-endorsed each other.

According to a report in Politico, Mamdani is expected to endorse Lander’s campaign for Congress.

Goldman, a former prosecutor, has represented the district that encompasses parts of Brooklyn and Manhattan since 2023.

He has faced criticism from some progressives for his staunch defense of the Israeli government.