flaring and deadly political upheaval. we re learning more about who these young men are and why their families are so frightened. i m wolf blitzer ayou re in th situation room. we re coming to you from washington s historic constitution hall, the scene of tonight s cnn republican presidential debate in which we ll focus on national security and foreign policy. in just under four hours, the candidates will walk on stage. it s been ten days since their last face-off an in that time, there have been some dramatic changes in the race. newt gingrich is now at the front of the pack according to our new poll. in this statistical dead heat with mitt romney. and while his new top tier status puts gingrich in the spotlight, romney is always getting a lot of attention for his first television campaign commercial. an ad that s misleading at best. democrats are calling it quote, dishonest. and deceitful. cnn s joe johns is working the story for us. what is this all about? this is a