The 2008 United States Senate election in Louisiana was held on November 4, 2008. This was the first time since the 1970s that Louisiana used primaries for federal races. Incumbent Senator Mary Landrieu won a third term by 6.39 percentage points despite being forecast as one of the most vulnerable Senate Democrats during 2008. She had received praise and wide publicity for her advocacy after Hurricane Katrina, particularly during hearings regarding FEMA's response to the disaster. This is the last time that Democrats won any statewide election in Louisiana other than Governor.
Landrieu’s opponent John Kennedy garnered allegations of being a political opportunist after switching parties from Democrat to Republican in 2007.[1] He won the state's other U.S. Senate seat in 2016 and 2022 as a Republican, having unsuccessfully run as a Democrat for it in 2004.
Landrieu's increased vulnerability was supposed to be the result of a significant drop in the state's African-American population after Hurricane Katrina, especially in Landrieu's home city of New Orleans. Louisiana also elected a Republican senator in 2004 and President Bush won the state twice, in 2004 with 56.72% of the vote. Also, Republican Bobby Jindal won the 2007 gubernatorial election with 54% of the vote.
Though she was considered one of the most vulnerable incumbent senators in 2008, Landrieu won reelection by a margin of 121,121 votes and 6.39%, over-performing Democratic presidential nominee Barack Obama in the state by more than 12 percentage points.