Comedian Bill Maher on Friday issued a mea culpa to the GOP, admitted that he'd gone too far attacking Republicans before Donald Trump.

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On HBO his show "Real Time with Bill Maher," the comedian was discussing "young and idealistic" millennials who say they are not fans of Trump or Hillary Clinton Hillary Diane Rodham ClintonButtigieg stands in as Pence for Harris's debate practice Senate GOP sees early Supreme Court vote as political booster shot Poll: 51 percent of voters want to abolish the electoral college MORE.

"So I’ve heard these young people on the news they say things like Donald Trump I don’t like him but Hillary, I can’t vote for a liar," he began.

"First of all, it’s just apples, and oranges — and orange," Maher joked.

Maher made a plea to young voters, warning them against a "fascist" Trump.

"This is different. I promise it, this will not make your life better. And also, once fascists get power, they don’t give it up. You’ve got President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE for life," he said.

Maher admitted to being too harsh in criticizing Republican candidates before Trump, acknowledging that they wouldn't have been the "end of the world."

"I know liberals made a big mistake because we attacked your boy [George W.] Bush like he was the end of the world, and he wasn’t," he said. "And Mitt Romney we attacked that way. I gave Obama a million dollars because I was so afraid of Mitt Romney."

Maher said neither Romney nor Sen. John McCain John Sidney McCainCindy McCain endorses Biden: He's only candidate 'who stands up for our values' Biden says Cindy McCain will endorse him Biden's six best bets in 2016 Trump states MORE would have "changed my life that much" if they'd defeated President Obama.

"They were honorable men who we disagreed with and we should have kept it that way," he said. "So we cried wolf and that was wrong. But this is real. This is going to be way different."