Mayor de Blasio is a big fan of presidential hopeful Bernie Sanders — because the Vermont senator is a proud “Democratic socialist.”

“Bernie Sanders has done an extraordinary job talking about where we need to go as a country,” Hizzoner raved during an interview with CNN Friday.

De Blasio was quick to correct CNN’s Carol Costello after she called Sanders a “socialist,” telling her the senator is a “Democratic socialist.”

“I think there’s a lot to like in that title,” he gushed.

De Blasio considers himself a “progressive Democrat,” mayoral spokeswoman Karen Hinton later clarified.

De Blasio wasn’t nearly as enthusiastic when asked about Hillary Rodham Clinton’s candidacy.

He said that while she’s “more experienced and able” than most “people who run for president,” her message has been “very broad.” He said he would like to see Clinton lay out a “clear road map” for tackling issues like income inequality.