Name the principle she violated.
She hasn't violated any principle - she's been a beautiful voice of conservatism. But she is not going to be taken seriously as a presidential candidate by a majority of people if she stays on this path. There is nothing wrong with what she is doing - but she has got a big job ahead of her to establish some gravitas on a national and international scale.
She's entertaining to watch, and she says the right things (except for her endorsement of John McCain) - but that alone is not going to be enough for her to beat Barack Obama in 2012. We need a SERIOUS candidate, and we need to be cultivating them NOW.