No, CBS hasn’t said 25% of Republicans are backing Harris | Fact check

An Oct. 29 Threads post (direct link, archive link) claims a major news network reported Vice President Kamala Harris is getting a significant number of votes from an unexpected demographic.
“CBS exit polling is showing 25% of Republicans are voting Harris,” reads the post. “TX, FL, OH are officially in play.”  
It was reposted more than 50 times in two days. Other versions of the claim spread widely on Threads.  
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The network hasn’t published any such figure because its exit polling is conducted on Election Day, a CBS spokesperson said.
The claim came amid various polls showing Harris and former President Donald Trump were virtually tied in the days leading up to the Nov. 5 election.
But no poll measuring Republican voters’ support for Harris is referenced on CBS’ website, and the network said the claim is false.
“CBS News only reports exit poll results after polls close on Election Day, which has not happened yet, so these (claims) are inaccurate,” spokesperson Hugo Rojo told USA TODAY.  
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The network does, however, conduct polling ahead of the election, creating snapshots of how likely voters from diverse backgrounds will cast their vote.
A CBS poll published the same day as the Threads post found that Harris and Trump were tied in Pennsylvania, a major battleground that both candidates are vying for.
The network has also reported on Republican support for Harris, which has come from individuals including former Wyoming Rep. Liz Cheney and former Illinois Rep. Adam Kinzinger. Harris previously touted a USA TODAY report that more than 200 Republicans endorsed her campaign, and her Oct. 29 speech at the Ellipse in Washington included outreach to Republican voters, as the New York Times reported.
Though no such CBS poll exists, others have measured Republican support for Harris. A New York Times poll published on Oct. 8, for example, found that 9% of Republican respondents said they would support Harris if the election were held that day.
USA TODAY has debunked an array of claims related to the election, including false assertions that Lancaster, Pennsylvania, has 180,000 newly registered Amish voters, that votes cast on ballots marked by poll workers are disqualified and that Minnesota Gov. Tim Walz violated election law by helping his son vote.  
USA TODAY reached out to the user who shared the post for comment but did not immediately receive a response.
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(This story was updated to add new information.)