Learning from the movement's stumbles in 2010, a grassroots collection laid the groundwork to defeat the six-term Indiana senator.
The liberal favorite still trails incumbent Scott Brown in cash on hand, but her impressive haul brings her closer in the neck-and-neck Massachusetts Senate race.
The sharp reversal by the former senator gives Democrats a much better chance at keeping retiring Senator Ben Nelson's seat.
The Maine Republican's decision to retire is a blow to GOP hopes for retaking control of the Senate in November.
The movement helped elect a string of minorities and has vaulted an African American to the top of the Republican presidential race
After the state became a battleground for national interests, both sides will leave with more questions than answers
Democratic contender Zerban challenges the Republican congressman's Medicare booster proposal by way of petition
Fewer Republicans see her favorably, while more see her unfavorably