>> the president of the united states over a year ago said that if bashar assad used chemical weapons, it crosses a red line. we know for sure that he's used them at least once. now here's the second time. horrific, horrific. and if the united states stands by and doesn't take very serious action, not just launching some cruise missiles, then again our credibility in the world is diminished even more if there's any left. >> so what do you say to senator mccain? >> i work backwards from his final comment, if there's any left. very, very few americans are prepared to wage a syrian campaign which it sounds to me what john mccain is describing. i don't know hardly any american who believes that coming out of iraq which by the way had 97