Clinton has been immersed in politics for decades, and yet the panel managed to make the contrast between her manner and the ways of Washington look stark. She appeared to be a sensible outsider. At 7:15 P.M., nine hours after the hearings began, Martha Roby, of Alabama, asked Clinton about her movements when she went home on the night of the attack. “Were you alone?” she asked. Yes, Clinton said. “The whole night?” Clinton started to laugh once more. “I don’t see why that’s funny,” Roby said. Not funny, perhaps, but, like the Benghazi committee itself, absurd.