Comedian Bill MaherWilliam (Bill) MaherButtigieg: If Trump refuses to leave White House, he can 'do chores' Bill Maher booed on HBO show after mocking liberals for calling Bloomberg racist Bill Maher warns 'woke-y' Democrats: 'Trump had his best week ever,' will be 'hard to beat' MORE joked about 2020 candidates criticizing former President Obama at the Democratic presidential debate this week.

"The Democratic candidates went after the president hard. Unfortunately, the president was Obama," he said on "Real Time with Bill Maher," according to a clip posted Friday by Mediaite

"The guy with the 97 percent approval rating among the Democrats," he added. "His shit is not woke enough now."

"Trump saw that. He called Putin. He said, 'I got this one,'" Maher quipped.

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During Wednesday night's debate, Democratic candidates hit former Vice President Joe BidenJoe BidenThe Democratic nominee won't be democratically chosen Fox's Ingraham mocks DNC over Nevada voting malfunctions: 'Are we a Third World country?' At Democratic debate, missed opportunities on immigration MORE for Obama administration policies.

New York City Mayor Bill de BlasioBill de BlasioNew York attorney general threatens to sue NYC over alleged taxi fraud Bloomberg compared civil libertarians, teachers union to NRA 'extremists' in 2013: report De Blasio endorses Sanders for president MORE (D) asked Biden whether he tried to stop deportations while he served as vice president. 

"I keep my recommendations to him in private," Biden responded during the Detroit debate. 

Sen. Cory BookerCory Anthony BookerThe Hill's 12:30 Report: Dem anxiety grows ahead of Super Tuesday House to vote on legislation to make lynching a federal hate crime Overnight Energy: EPA to regulate 'forever chemicals' in drinking water | Trump budget calls for slashing funds for climate science centers | House Dems urge banks not to fund drilling in Arctic refuge MORE (D-N.J.) also told Biden he couldn't pick and choose when he wanted to be associated with Obama. 

“Mr. Vice President, you can’t have it both ways,” Booker said. “You invoke President Obama more than anybody in this campaign. You can’t do it when it’s convenient and then dodge it when it’s not.”

The candidates were among 20 who took the stage at the debate on Tuesday and Wednesday.