Is political compromise alive? Lessons from New Hampshire.

Politicians may often feel they have little choice but to appeal to the most liberal or conservative voters. Is there another way? A recent effort shows some promise, but also the challenges.

“We have a rule that’s kept us happily married,” says Chris Hagen, a Republican whose husband is a Democrat. “We live on a street corner, and we don’t allow any political signs on our lawn,” she says with a laugh.

The Hagens represent a significant swath of Americans who fall in between the more vocal groups on...