Hold on, some of my fellow conservatives say. Never mind Hillary. Trump would be dangerous. He would further endanger our national security and world position. He might start unnecessary wars. He might even push the nuclear button. These are important objections, but after thinking them through I’m unable to take them seriously, either in political terms or psychological ones.

Mrs. Clinton is right at home in the Oval Office and thinks she owns it. She holds herself entitled to supreme power, as her friends are entitled to fancy positions with enormous salaries and her followers to secure government jobs or ample government funds, as the case may be.

But forget psychology. Ordinary politics says that Mr. Trump will not do crazy things or go off half-cocked, because Republicans in Congress will be eager to impeach him and put Mike Pence in charge. That was the subtext of the vice-presidential debate, though Mr. Pence himself (probably) didn’t intend it. When it’s my turn, you can all relax. Democrats, obviously, will be eager to help when the task is removing a Republican.

Impeachment is Trump-voters’ ace in the hole.