Ten minutes into Sen. Clinton’s address to a crowd of 700 in Salem, NH, a man near the front of the hall interrupted the remarks — standing up with a big, yellow sign reading “Iron My Shirt” and loudly chanting the same phrase. He was soon joined by another man in the back.

“Iron my shirt!” will take over “Don’t tase me, bro!” as the trendiest new phrase in 5, 4, 3…