>> if you're a betting person, why wouldn't you throw your money on christie, 75-1. >> because it's illegal. that's why, matt. >> good answer. >> if you lived in ireland, then you could make the bet. >> yes. we do have to tell you that. you cannot bet on this, even in vegas you're not supposed to bet on the election. don't do it. and it would be scary money at this point, because you never know what's going to happen. >> so true. tonight anything can change, mark. thank you. >> it always does by the way. that's why we get so excited about these debates. things are different after them. these are main events. >> they are unpredictable. coverage of tonight's gop debate starts at 6:00 p.m. eastern, the undercard debate, followed by the main debate at 8:30. >> what is tonight supposed to be about, national security and terrorism. those are the categories that wolf blitzer will test the candidates on at the venetian in las vegas. that's why we're here. >> will one candidate emerge as the best qualified to keep