arizona. you re in the situation room. they are numbers that are making mitt romney nervous. they are certainly catching the attention of the obama re-election campaign. we re talking about the latest polls that show rick santorum at the front of the republican presidential pack. look at that gallup tracking poll number that has santorum ten points aheads of romney nationally among registered republicans. even with the sampling error, santorum is the frontrunner in this poll. but that position comes with an extra bit of scrutiny and santorum is now being called on to explain some rather controversial remarks from recent days. our national political correspondent, jim acosta is joining us now. jim, what s going on with rick santorum and his campaign right now? rick santorum has spent the last couple of days making hot comments about the president and touch, on sensitive issues. it s a reminder of the culture that santorum has worn proudly throughout his career. lately, ric