ATLANTA — The South is where President Barack Obama and Democrats long have struggled, and it's where the party's toughest battleground will be this year in the fight for control of the U.S. Senate.
Three incumbents must face the consequences of having voted for Obama's health care law, but Republicans first must settle primaries in several states, including a challenge to Minority Leader Mitch McConnell of Kentucky.
All but one of the potentially competitive races is in a state Obama lost in 2012, and the president remains deeply unpopular among whites in the region. Republicans are optimistic they can achieve the six-seat gain needed to retake the Senate.
Democratic Sens. Kay Hagan of North Carolina, Mary Landrieu of Louisiana and Mark Pryor of Arkansas are on the ballot for the first time since voting for the Affordable Care Act in 2010. The law's wobbly start and its image as a power-grab have the incumbents on the defensive, emphasizing local issues and avoiding unnecessary mention of the second-term president who leads their party.
Obama's Gallup job approval lingers in the low 40s, and is even lower in several states with pivotal Senate races. Republicans want to feed on that and follow the same road map that carried them to a House majority in 2010, Obama's first midterm election.
"Democrats hope this doesn't become a national election, but we don't think that's the case," said Republican National Committee spokesman Michael Short.
Democrats want the Republican primaries to project divisions and extremism, especially in races where the GOP's leading candidates are now in the U.S. House. Democrats note that Congress is more unpopular than the president.
In 2012, Democrats defied early predictions and expanded their Senate majority by winning in GOP-leaning Missouri and Indiana, where conservative candidates tripped over their own pronouncements on rape and other issues.