The couple avoided discussing the campaign into the summer, and Dr. Maguire, who said she will vote for Hillary Clinton, fell under the impression that her husband would no longer be supporting Mr. Trump. But in an interview on July 28, Dr. Stossel restated his support for the Republican nominee.

“I’m reasonably convinced that Hillary is handcuffed to the economic progressive populism that has totally taken over the Democratic Party, a.k.a., socialism,” said Dr. Stossel, a visiting scholar at the conservative American Enterprise Institute. “I think that if she gets power and the party gets power, there is a good likelihood that the agendas of that movement will be enacted. To me, that counters what I consider to be what brings us prosperity, which is entrepreneurship.”…

In a separate interview later that afternoon, Dr. Maguire seemed unaware of her husband’s stance. She sounded confident that Dr. Stossel had been dissuaded from his support by friends, as well as her quasi-threat to leave him. When told by this reporter of her husband’s intent to go through with voting for Mr. Trump, she seemed shocked, if not angry.

“That is news to me,” Dr. Maguire said. “And I’ll be calling my attorney.”