Bradley Tusk, one of Harold Ford’s advisers, is making the rounds with labor leaders, sources told The Post.

Tusk, who worked as Mayor Bloomberg’s 2009 reelection campaign manager, has met with several union heads recently, including Neal Kwatra at the Hotel and Motel Trades Council and Steve McInnis of the local carpenters’ union, sources said.

Ford also had lunch with Public Advocate Bill de Blasio yesterday and schmoozed with the Rev. Al Sharpton on Martin Luther King Day Monday.

He is considering a primary challenge against Sen. Kirsten Gillibrand, a Democrat who is considered vulnerable but who has support from the White House and Sen. Chuck Schumer.