House Republicans privately worry about Democrats replacing Biden: 'Changes everything'

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As questions continue to mount about President Biden's fitness for office, some House Republicans are privately concerned that replacing him at the top of the Democratic ticket could result in the GOP losing the White House in November.

"As a human, it's probably good for Joe Biden that he's now probably not going to have to be subjected to this another four years. But for the party, it's not great. It's not clear to me that it's good for us, either," one House Republican told Fox News Digital on the condition of anonymity.

"We had Trump versus Biden, which was a very lopsided, in my opinion, a very lopsided fight… the Dems would be insane to run Biden again. Like, they can't, it's like they can't at this point."

With a potentially younger and more popular replacement, the GOP lawmaker said it became "a tougher race."

"It changes everything. It's just a completely unknown wildcard right now," the GOP lawmaker said.

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They suggested that California Gov. Gavin Newsom or a similar popular figure somewhere like New York could inspire higher turnout among Democratic voters in those states, putting Republican-held swing seats in jeopardy in down-ballot races.

It comes after Biden's poor performance in Thursday night's CNN Presidential Debate, his first debate against former President Trump