"If we end up with two or three more economic shocks, for example if Greece goes bankrupt or the Euro starts decaying, or if the Middle East begins to get much more difficult and you start having real problems with the price of oil, I think it would not take much for some very senior Democrats to say, you know, we are prepared to mount a campaign and field a candidate against you." http://www.breitbart.tv/newt-predicts-primary-obama-primary-challenge/