Mayor de Blasio appears to have broad support in the City Council for a bill that would allow him to establish a legal defense fund — since it would cover all elected officials as well, sources said Monday.

“This is a sore subject for members,” said one source. “You could be innocent and go bankrupt defending yourself.”

The Conflicts of Interest Board rattled New York City’s political world last week by setting a $50 limit on contributions to legal defense funds. That’s a big problem for the mayor, whose legal bills from state and federal investigations could run into the hundreds of thousands of dollars.

Councilman Jimmy Van Bramer (D-Queens) said he would support a bill that capped donations at $4,950, the same limit applied in mayoral elections.

“I think we should never go back to the days of the Campaign for One New York,” Van Bramer said, referring to de Blasio’s now-shuttered nonprofit that sought to promote his political agenda and raked in six-figure contributions.