Nate Silver analyzes Chambliss's victory:
...while proportionately lower black turnout tells part of the story, Chambliss also appeared to gain with white voters.
In certain ways, this is an awkward time for a Democrat to be running for office. On the one hand, with the imminent end of George W. Bush's term in office, and the fact that Barack Obama has effectively been serving as shadow present -- Obama is generating between two and three times as much news coverage as Bush according to Google traffic metrics -- it has already become harder for Democrats to pin our country's problems on the Republicans. Yes, Bush did damage to the Republican brand that will last for years to come, but it's the Obama brand that's strong more so than the generic Democratic one. On the other hand, because Obama hasn't actually been in office, the Democrats do not yet have any accomplishments to point to.