former governor tommy thompson, businessman eric hovde and mark neumann are fighting for his seat. in connecticut joe lieberman has passed on another possible term. linda mcmahon is in the ring again against former congressman chris schays and the primary and then arizona where senator jon kyl has had enough of politics. congressman jeff flake is facing off against businessman will cardon. "national journal" hot line editor and chief wrote about the crucial races today for which we're in his debt. it is a pleasure to you have on the program tonight. >> thanks for having me. >> you're writing about four senate primaries held in the next couple of weeks which most people don't even know about. they could control -- determine control of the senate and the political direction of the senate. how far right or left it moves which one is most captivating to you? >> there are two that i think are most fascinating. i'll start with one coming up on tuesday in missouri where three rep are cans are fighting it out for the right to face senator claire mccaskill. these three candidates are a litt