Obama leads in battlegrounds

The newest slew of battleground state polls show Barack Obama ahead in Colorado, Florida, and Virginia -- states that if he won on Nov. 4 would likely guarantee him the presidency.

John McCain leads in Georgia, and the two are tied in Missouri, according to the CNN/Opinion Research Corp. surveys released this afternoon.

In Colorado, Obama leads 51 percent to 46 percent among registered voters. In Florida, he leads 52 percent to 44 percent. And in Virginia, he leads 53 percent to 43 percent. The leads are slightly smaller among likely voters.

McCain is ahead 51 percent to 47 percent among registered voters in Georgia, and has a larger lead among likely voters.

In Missouri, Obama has 50 percent and McCain 47 percent among registered voters, while McCain has 49 percent and Obama 48 percent among likely voters.

While likely voters are determined by how often they have voted in the past, Obama has attracted millions of new voters during the primaries.

The polls were conducted Saturday through Tuesday and have a margin of error of plus or minus 3 percentage points.