Hillary, let it go....

Why does Hillary not just move on from the disastrous answer regarding drivers license for illegals at the last debate? Why does she feel she must keep defending herself on what could easily have been downplayed?

Mickey Kaus thinks it could be one of two things:

It's the possibility that a) she panics in adversity--a point Levin emphasizes or b) she's too vain to let herself be perceived as having given a wrong answer, so she goes back to correct it even when that only compounds the damage. .

The answer would be "b," of course.