On Tuesday night, long time incumbent U.S. Senator Thad Cochran (R-MS) defeated Tea Party challenger Chris McDaniel in the GOP Senate primary by a mere 6,800 votes. This razor thin margin was due to an influx of Democrats who entered the Republican primary to vote for Cochran.
How important is seniority and clout in the U.S. Congress?
That issue is being tested during this 2014 election season in various states and particularly within the Republican Party as the Tea Party candidates are taking on the mainstream incumbents.