“They didn’t ask me to participate,” Mr. Cruz said in a phone interview from his home in Houston. “So, I’m not on the speakers’ roster.”…

Asked in the interview to make a convention-style case for Mr. Trump’s re-election on the spot, Mr. Cruz cited the “remarkable policy successes” of the last four years, paused for 12 seconds, then set off on an auditorium-ready, fully-composed celebration of tax cuts, deregulation and the “historic economic boom” that preceded the coronavirus.

Asked if Mr. Trump was making this argument effectively, the senator ruled: “Sometimes.” (Mr. Cruz made clear that he “would have been happy to” step to a microphone this week, if invited.)