There's an old joke about a boy who complains to his mother that his little sister keeps pulling his hair.
"Oh," responds the mother, "she doesn't know that it hurts."
A few minutes later, the mother hears the girl scream and runs into the other room. "She knows now," the boy explains.
There's a lesson for Republicans in that old joke, if they're smart enough to absorb it.
For the past few...