this is a historic moment in this state's history. and because of your hard work, because of your dedication, we sit here tonight leading a 42-year incumbent. >> that's tea party challenger, chris mcdaniel, addressing his supporters last night in mississippi. he's going to be in a runoff election against incumbent republican senator, thad cochran, on june 24th. joining us now is casey hunt, nbc political reporter. she's just back from jackson, mississippi. boy, your arms must be tired. just flown in. you were in mississippi last night. i know, we talked from cochran headquarters and you were saying that everybody was kind of on all ten toes, a little stressed out about this. they must be worried about the