From Mason-Dixon polling for MSNBC and McClatchey newspapers:
Democrats are slightly ahead of Republican incumbents in three election battleground states that will help determine control of the Senate, a series of polls released Sunday showed.
In Montana, Democrat Jon Tester had the support of 47 percent of registered voters, while incumbent Republican Sen. Conrad Burns had the support of 40 percent.
In Ohio, Democrat Rep. Sherrod Brown had 45 percent of registered voters, while incumbent Republican Sen. Mike DeWine had 43 percent.
In Tennessee, Democratic Rep. Harold Ford Jr. had 43 percent, and former Chattanooga Mayor Bob Corker, the Republican Senate nominee, had 42 percent.
Democrats probably must win all three races if they’re to take back control of the Senate on Nov. 7. They need to gain six seats overall, and these three are among the six seats held by Republicans that are considered most vulnerable.
The same polling found that GOP Sen. George Allen of Virginia and Dem James Webb are tied, as are incumbent Republican Sen. Jim Talent and his opponent, Claire McCaskill.
