Eric Zorn: As Trump's die-hard supporters cling to unreasonable doubts, the rest of us must ask ourselves, now what?

I've related this old joke before, but the time seems right for a retelling.

A man who suspected his wife was having an affair hired a private investigator to follow her around.

"Here's what I saw," the gumshoe reported several days later. "On the night she told you she was out with her girlfriends, she was actually at a dimly lit restaurant having dinner