President-elect Donald Trump said Democrats made a major strategic error by involving former Republican Rep. Liz Cheney and her father, former Vice President Dick Cheney, on Vice President Kamala Harris’ presidential campaign.

The Democrats enlisted Ms. Cheney in a bid to show that people within Mr. Trump’s party don’t agree with him or stand with him. Ms. Cheney became a vocal Trump critic after the Jan. 6, 2021, attack on the U.S. Capitol and was a member of the bipartisan House committee that investigated the incident.

After being defeated in the primary for her Wyoming congressional seat in 2022, she endorsed Ms. Harris and became a campaign surrogate. Her father also endorsed the Democratic presidential ticket.

“The Democrats made a BIG mistake in getting Crazy Liz Chaney, and her father, Dick, involved in their campaign for President. It made the Republicans angry and the Democrats just plain scratching their heads in amazement,” Mr. Trump wrote on Truth Social Sunday. “It is always a bad idea to bring ‘losers’ into a political campaign!”

Mr. Trump has been especially critical of the Cheneys, long a part of the Republican Party establishment. He slammed Mr. Cheney as a “Republican in name only” for endorsing Ms. Harris.

“Dick Cheney is an irrelevant RINO, along with his daughter, who lost by the largest margin in the History of Congressional Races,” he wrote on Truth Social in September.

• Mallory Wilson can be reached at mwilson@washingtontimes.com.