Shortly after President Trump fired his FBI director in May, he summoned to the Oval Office the bureau’s acting director for a get-to-know-you meeting.

The two men exchanged pleasantries, but before long, Trump, according to several current and former U.S. officials, asked Andrew McCabe a pointed question: Whom did he vote for in the 2016 election?

McCabe said he didn’t vote, according to the officials, who, like others interviewed for this article, spoke on the condition of anonymity to talk candidly about a sensitive matter.

Trump, the officials said, also vented his anger at McCabe over the several hundred thousand dollars in donations his wife, a Democrat, received for her failed 2015 Virginia state Senate bid from a political action committee controlled by a close friend of Hillary Clinton.