Mr. Romney is also an oddity among Senate Republicans in that he has not withheld his low opinion of Mr. Trump. “He has made a career of trashing people by tweet,” Mr. Romney said in response to a question about what he thought of an outburst from the president on Wednesday morning about John R. Bolton, Mr. Trump’s former national security adviser, whose unpublished manuscript contains an account that contradicts Mr. Trump’s impeachment defense. “It is part of his shtick and it’s working for him,” he said of the Twitter attack. “I think it’s unfortunate.”…

Whatever, Mr. Romney said he was not one for dwelling or looking back. “You go back to my campaigns,” he said. “I sort of watch how the president reacts to his opponents, and it’s not the way I did it. But you know what? He won and I didn’t. On the other hand, he won and I didn’t but I would not have done what he’s done in order to win.”

It is not clear what exactly Mr. Romney is referring to here, nor does he elaborate except to repeat the last part: “I would not have done some of the things he did.”