For nearly 20 years, Ed Ring and his wife, Maggie, got together once a month or so for dinner and conversation with two longtime friends.

But something happened last summer: Donald Trump won the Republican presidential nomination.

Soon after, Ring recalls, their dinner conversation grew tense. How, the couple demanded, could he possibly support Trump? Then a few weeks later, to Ring’s surprise, his old friends made it known their relationship — and dinner dates — were over.

“‘I don’t want you around my children,’” Ring, who calls himself a moderate Republican, remembered the wife telling him as she broke off the friendship in a message on Facebook.