The hostility between Governor Andrew Cuomo and Mayor Bill de Blasio continues to be ratcheted up to new levels. Wednesday, the governor launched what might be his strongest attack yet, demanding de Blasio apologize for an accusation Cuomo says has been proven wrong. Bobby Cuza filed the following report.

For weeks, without ever explicitly naming him, Mayor Bill de Blasio strongly hinted Governor Andrew Cuomo was behind the leak of a damaging report from the state Board of Elections. But this week, the state inspector general found it was a Republican appointee at the Board of Elections who was responsible.

"I think he should apologize," Cuomo said.

Wednesday, Cuomo said the mayor had falsely and recklessly accused career public servants of misconduct—most notably, the board's chief enforcement counsel, Risa Sugarman, whose investigation found de Blasio’s team violated campaign finance laws in its fundraising for state Senate Democrats. De Blasio drew attention to the fact Sugarman was a Cuomo appointee, but it turns out she had nothing to do with the leak.

"I’m a big boy. He’s a big boy. You want to say something unkind about me, that’s one thing. But not public servants that were just doing their job. With no evidence whatsoever, by the way. And now we know definitively that he was wrong," Cuomo said.

Tuesday’s Inspector General report referred the matter to a state ethics panel and to the Manhattan district attorney. But Cuomo seemed to dismiss a question about the propriety of the leak, calling it a sideshow. He noted the mayor’s fundraising is now under investigation by both the Manhattan DA and U.S. attorney.

"Those investigations should be allowed to proceed," Cuomo said. "Get the facts and go from there. Everything else is irrelevant and a distraction and theater to distract from that."

Cuomo, who made the remarks following an unrelated announcement, is, of course, also facing investigations into state economic development initiatives.

A de Blasio spokeswoman did not respond directly to Cuomo, but said in a statement, "The State BOE leaked a confidential memo, and has been called out for failing to have proper policies in place to safeguard against these leaks. The BOE owes the people of New York an apology for such a flagrantly political act."

Q: Would you vote for Bill de Blasio for a second term?
Cuomo: Oh. Uh, I’m not a city resident.