Today is primary election day in Missouri, Kansas and Michigan. The biggest high-profile race is in Missouri where Gov Bob Holden (D) is trying to fight off a primary challenge from State Auditor Claire McCaskill. The race is supposed to be too close to call. The winner of the Dem primary will face Sec of State Matt Blunt (R) in November. In CD-3, there's a wide-open primary for Dick Gephardt's seat with Russ Carnahan, the son of Mel & Jean Carnahan, the front-runner in the Dem primary. In Kansas, the big event is the GOP primary in CD-3 between Adam...