Another Dem senator to retire; majority status at serious risk

It's looking more and more challenging for the Democrats to keep their majority in the U.S. Senate, let alone achieve a supermajority, in 2014.

Tomorrow, Sen. Tim Johnson (D-SD) will formally announce that he will be retiring from the Senate after his current term and will not seek reelection in 2014.

This comes on the heels of similar announcements by Senators Tom Harkin (D-IA), Frank Lautenberg (D-NJ), Carl Levin (D-MI), and Jay Rockefeller (D-WV).

I can't say I blame them for wanting to get out of there. But the prospect of the GOP picking up some of their seats is frightening.