Trying to Gauge the 'Obama Effect' in Senate and House Races
Barack Obama could bring many new voters to the polls, but the length of his coattails is unclear
Posted August 4, 2008
Senators talk to reporters after they voted 62-36 to approve an overhaul of the nation's immigration laws. From left to right: Mel Martinez (R-FL) Chuck Hagel (R-NE), Lindsey Graham (R-SC) Sam Bronwback (R-KS) and John McCain (R-AZ). (Jeffrey MacMillan for USN&WR)