following a speech today at the national automobile dealers association in new orleans, she laughed off the question. >> i have to say i don't know. it's not a very satisfactory answer, i know. i'm not thinking about it. i try to get other people not to think about it. >> reporter: just the group ready for hillary was in hiiowa busy trying to lay the groundwork for a win in the first in the nation caucus. issues dogging her is the death of ambassador chris stevens in the attack on benghazi libya consulate. she has yet to address the issue publicly. >> my biggest regret is what happened in benghazi. it was a terrible tragedy losing four americans, two diplomats