In the wake of a testy interview with Elon Musk, the former television anchor Don Lemon’s deal for a new talk show on X combusted just days before it was scheduled to air.

Mr. Musk called off Mr. Lemon’s partnership with X, the social media platform formerly known as Twitter, the day after filming an hour-and-a-half long interview with the former news anchor at SpaceX’s office in Austin, Texas. The conversation was occasionally tense, Mr. Lemon said, as he asked probing questions about the upcoming U.S. presidential elections, Mr. Musk’s reported drug use and his various businessventures.