Dan Gelber: Do you really want be a member of a club that has Donald Trump as its front-runner?

True story. When we got through security at LaGuardia airport on the way home from a Thanksgiving in New York City, my kids were treated to the profane-laced diatribe of a woman who had been pulled aside for a random TSA check. She was berating the TSA officer who was politely asking her to extend her arms so she could do her job. “Why are you checking me, I’m an American you @%&$ idiot! You need to check the #@&%…