Reuters has a nice article up about the challenge Joe Lieberman is facing this year:

After years of ardent support for the Iraq war, Connecticut Sen. Joseph Lieberman could become that conflict’s first big political casualty in a Democratic primary race fueled by rising anti-war anger.

Lieberman, the party’s vice presidential nominee in 2000, faces a growing challenge from a political neophyte who has rallied Democrats angered by the senator’s enthusiastic backing of the war and willingness to support Republican President George W. Bush on other issues.

Challenger Ned Lamont’s underdog bid to unseat Lieberman in Democratic-leaning Connecticut could offer an early gauge of the intensity of anti-war sentiment ahead of November’s midterm elections, along with a measure of the influence of the Internet activists and bloggers who have flocked to his cause.

“Senator Lieberman has cheered on the president every step of the way when it comes to the invasion of Iraq, and he is too quick to compromise on core Democratic principles,” Lamont, a businessman and former Greenwich town selectman, told Reuters….read on