clouds of tear gas in the streets of cairo again as police battle protesters, we ll take you right into the middle of the clashes, i m wolf blitzer, you re in the situation room. a day after the republican candidates sparred and cnn s national security debate. mitt romney is back out there on the campaign trail. he picked up a new endorsement today in iowa. key conservatives have already held secret talks there. end of fining alternative candidate for the support. cnn joe johns is tracking the latest for us. joe. six weeks out from the iowa caucuses, if you take a picture, race for the nomination, it s clear as mud. the strangest thing of all in the volatile race, mitt romney and the within most republicans can believe is the president is not the person they say they re most likely to support. for the anybody but romney crowd, this had to be a rich moment. senator john thune, the true conservative, could have been a republican contender from president but decided not to