Taylor Swift’s endorsement of Kamala Harris this week should teach hard truths to two men: JD Vance should never have spoken ill of “childless cat ladies.” And Donald Trump should never have messed around with artificial intelligence.

After the presidential debate Tuesday night, Swift posted a photo of herself that amounted to a subtweet of Vance — looking into the camera head on, holding her fluffy, blue-eyed cat, a ragdoll named Benjamin Button. The caption was a letter to her fans, explaining why she plans to vote for Harris, citing LGBTQ rights, in vitro fertilization, abortion and, incongruously, deepfakes.

The unexpected addition to the list of progressive policy priorities was a response to images that Trump, perhaps jokingly, posted to Truth Social late last month. “Swifties for Trump,” read the signs in one photo. “Taylor wants YOU to vote for Donald Trump,” says the text on another that features a robotically generated Swift posing Uncle Sam-style. Swift, however, does not even want to vote for Donald Trump herself, and she set the record straight.

“Recently I was made aware that AI of ‘me’ falsely endorsing Donald Trump’s presidential run was posted to his site,” Swift wrote Tuesday. “The........

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