At the second Democratic presidential debate, Bernie Sanders repeated a talking point about guns and "shouting" that helped spark a controversy over sexism. And he said it in a way that sounded like a joking, self-conscious reference to the earlier incident.

"People all over this country — not you, Secretary Clinton — are shouting at each other" over guns, Sanders said.

At the previous debate, during an exchange on guns, Sanders had rebuked Clinton by saying that "all the shouting in the world" wouldn't accomplish what we'd like on gun violence. The Clinton campaign later responded to this by saying that "when women talk, some people think we're shouting."

Sanders's callback to the "shouting" quote was a somewhat awkward and defensive moment that probably would have been better left unsaid. Defensiveness over Clinton's quote helped lead to a much bigger gaffe from the campaign manager about how Hillary would make a "great vice president."