There is a lot of interest right now in Mayor Bill de Blasio's fundraising habits, as they are the subject of several federal and state investigations.

And de Blasio made it clear that despite the attention from prosecutors and others, he is going to keep raising money for his mayoral re-election campaign. 

De Blasio indicated in a radio interview on WNYC on Friday morning that he might even be willing to welcome the help of a Super PAC in that effort.

Super PACs can accept unlimited sums of money, but they are prohibited from coordinating their efforts with a specific candidate's campaign.

Some politicians, like Democratic presidential candidate Bernie Sanders, have ruled out accepting Super PAC support.

The mayor suggested he might want a Super PAC in his corner because he expects wealthy individuals and businesses fighting his agenda to bankroll a candidate to challenge him next year.

"I've said clearly: if other people choose to run for this office, God bless them. I'm convinced that at least one candidate will come forward who is heavily, heavily financed by the hedge funds or other powerful interests," de Blasio said on WNYC. "We are going to have to make decisions at that point about how to handle things."

De Blasio said he has already been the target of well-funded ad campaigns against him, well before he was up for re-election.

"Landlords, multi-national corporations, hedge funds — grand total $11 million in issue advertising directed against me in just over two years. So, we can count," the mayor said in the WNYC interview. "We understand that very powerful forces are going to challenge our progressive agenda, and we are going to be able to fight back from the grassroots."

Despite his refusal to rule out a Super PAC, the mayor says he is focused on raising small donations from New Yorkers.

De Blasio held a fundraiser Thursday night at Brooklyn Bowl in Williamsburg that more than 600 people attended, according to the campaign and a source inside.

The mayor said he expects to have raised $750,000 from the event, when public matching dollars are included.

Tonight on Inside City Hall, I'll be talking with a Republican who may challenge de Blasio next year: City Councilor Eric Ulrich of Queens. We'll see what he has to say about the investigations into the mayor.

And then we'll have our Friday Reporters Roundtable. That's all at 7 and 10 p.m.