The Hill’s Aaron Blake has the story:
Rep. Roy Blunt (R-Mo.) will announce his candidacy for Senate on Thursday, sources close to Blunt have confirmed.
Blunt has been expected to enter the 2010 race for weeks. His candidacy sets up a potential clash of the families in Missouri, as Secretary of State Robin Carnahan has entered the race on the Democratic side.
Carnahan comes from a well-known Democratic family that includes former Gov. Mel Carnahan (D-Mo.) and former Sen. Jean Carnahan (D-Mo.). Blunt