Listening to Sen. Mary Landrieu's opponents, you might think President Obama was up for re-election. Tuesday night in Shreveport, the three candidates faced off in a debate for the first time.

Democrat Landrieu is waging hard-fought battle for re-election in a race that could help decide which party has control of the U.S. Senate. Republican Rep. Bill Cassidy and a Tea Party candidate, Rob Maness, are her main challengers in Louisiana's open primary on Nov. 4.