Democrats' Vulnerable 2012 Senate Seats
(Chip Somodevilla/Getty Images)
One of the many new Democratic faces who swept into the Senate in moderate and conservative states during the blue wave of 2006, Democratic Sen. Jon Tester
will face re-election in a very different environment. He'll likely face Republican Rep. Denny Rehberg
, Montana's only at-large congressman, who's held his seat since 2000.