The two Republicans who have announced primary challenges to President Donald Trump have suggested that Cabinet officials should consider invoking the 25th Amendment to remove him from office.

Former Massachusetts Gov. Bill Weld, who in April became the first Republican to jump into the race against Trump, tweeted Wednesday that the president is “a clear and present danger” to the U.S. with the hashtag ”#25thAmendment.”

Shortly after announcing his candidacy for the GOP’s presidential nomination on ABC’s “This Week,” former Rep. Joe Walsh of Illinois was asked if he believes the 25th Amendment should be invoked, as his fellow Trump primary challenger appeared to suggest.

“It should be looked at,” Walsh told host George Stephanopoulos. “We’ve never had a situation like this. You can’t believe a word [Trump] says. And again, I don’t care your politics ― that should concern you. He’s nuts. He’s erratic. He’s cruel. He stokes bigotry. He’s incompetent.”

“George, he’s a narcissist,” Walsh, who made a name for himself as a Tea Party activist, continued. “The only thing he cares about is Trump. He doesn’t give a damn about America.”