Big score for retired navy commander and Dem congressional candidate Eric Massa: AFL-CIO throws its weight behind him after switching support from incumbent GOP Rep. Randy Kuhl -- further imperiling the GOP's hold on one of most hotly-contested seats in the country.

UPDATE: There's a very interesting rundown on this closely-watched race by McJoan over at Daily Kos. She notes that Kuhl is vulnerable as a freshman who only won 51% of the vote in 2004.