Joe Walsh announces Republican challenge to Trump

Former Rep. Joe WalshJoe WalshTrump becomes presumptive GOP nominee after sweeping primaries Trump sweeps through mini-Super Tuesday primaries Trump glides to victory in Super Tuesday GOP primaries MORE (R-Ill.) on Sunday announced he would mount a primary challenge to President TrumpDonald John TrumpIllinois governor says state has gotten 10 percent of medical equipments it's requested Biden leads Trump by 6 points in national poll Tesla offers ventilators free of cost to hospitals, Musk says MORE.

The conservative radio host unveiled his campaign on ABC's "This Week."

"We've got a guy in the White House who is unfit, completely unfit to be president, and it stuns me that nobody stepped up, nobody in the Republican Party stepped up, because I'll tell you what, George, everybody believes in the Republican party, everybody believes that he's unfit," Walsh told ABC's George StephanopoulosGeorge Robert StephanopoulosSanders focuses on Biden's record, predicts Michigan victory as primary becomes two-man race Carson declines to 'preview' plan for virus-stricken ship's docking: 'We shouldn't have 16 people saying what the plan is' Civil rights activist Jesse Jackson endorses Sanders MORE. "He lies every time he opens his mouth." 

Walsh was elected to the House in 2010 as part of the Tea Party wave and served one term. He began as a strong supporter of President Trump but over the past year has emerged as a fierce critic of the president. On Sunday, he apologized for tweets Stephanopoulos described as racist and sexist as well as his "personal" criticism of former President Obama, acknowledging the role it played in creating today's politics.

"I helped create Trump. There's not doubt about that. The personal, ugly politics," he said. "I regret that. And I'm sorry for that. And now we've got a guy in the White House, that's all he does."

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When asked about Trump's high approval rating among Republicans, Walsh said GOP voters had no alternative, adding that many of his former colleagues in the House feel the same way.
 
"I'm running because he's unfit. Somebody needs to step up, and there needs to be an alternative," Walsh said. "The country is sick of this guy's tantrum. He's a child. Again, the litany. He lies every time he opens his mouth. Look at what's happened this week. The president of the United States is tweeting us into a recession."
 
After being asked about invoking the 25th Amendment to remove Trump from office, he added, "We've never had a situation like this. ... You can't believe a word he says. He's nuts. He's erratic. He's cruel. He stokes bigotry. He's incompetent. He doesn't know what he's doing. George, he's a narcissist. The only thing he cares about is Trump."
 
Walsh in a tweet announcing his campaign said the U.S. "can't take four more years of Donald Trump."
 
"It won't be easy, but bravery is never easy," he added. 

This breaking news report was last updated at 9:43 a.m.