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 ClintonHillary Diane Rodham ClintonCountering the ongoing Republican delusion Republicans seem set to win the midterms — unless they defeat themselves Poll: Democracy is under attack, and more violence may be the future 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 TrumpDonald TrumpPence: Supreme Court has chance to right 'historic wrong' with abortion ruling Prosecutor says during trial that actor Jussie Smollett staged 'fake hate crime' Overnight Defense & National Security — US, Iran return to negotiating table 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 McCainJohn Sidney McCainGOP senators appalled by 'ridiculous' House infighting MSNBC's Nicolle Wallace, Chris Christie battle over Fox News Trump's attacks on McConnell seen as prelude to 2024 White House bid 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."