Ron Johnson — by raising his voice, getting testy, and interrupting — tricks Hillary Clinton into losing her modulation.

My interpretation of this is that Clinton had prepared for this question and practiced getting indignant, but she was not quite ready for the tension cranked up by the wily Wisconsinite Johnson. So the workshopped outrage flipped out over the top. Great theater.

ADDED: "It was theatrics... she didn’t want to answer questions so she makes a big show of it," said Ron Johnson afterwards.