The Insider Advantage polling group of Atlanta shows Republican John McCain with a 1 percentage point lead over Democrat Barack Obama, 48 percent to 47 percent. Libertarian Bob Barr is polling at 2 percent, with 2 percent undecided.

The Insider Advantage poll was conducted Sunday night from respones from 512 likely voters. The margin of error is plus or minus 4 percent.

"What we'll be watching early on is returns from smaller counties which will be heavily McCain to see if McCain is performing at the levels he needs to carry the state," said Matt Towery, chairman and CEO of Insider Advantage. "It won't be until late in the evening - and, likely, the next day - that the contest will tighten up and become a race."

"I still think McCain is likely to win Georgia by a smidgeon but if my gut is right and blacks are voting beyond 30 percent, then he's a dead duck."

The poll has incumbent Republican Sen. Saxby Chambliss with a 6-point lead lead on Democratic challenger Jim Martin, 48 percent to 43 percent, with 2 percent for Libertarian Allen Buckley and 7 percent undecided. If no candidate earns more than 50 percent of the vote, the race will go to a runoff in three weeks.

"This race is a doozy," Towery said. "Martin has not risen at all in our polling recently and Chambliss has, which shows that Chambliss has begun to at least consolidate his base and remind people he is a U.S. senator, and has raised Martin's negatives."

The Public Policy Polling group of Raleigh, N.C., showed McCain with 50 percent of the vote to 48 percent for Obama. But Obama leads McCain 52 percent to 47 percent among voters who cast their ballots early, the survey showed. Of those who have voted, Democrats led Republicans by 6 percentage points, and 35 percent of early voters are black.

A majority of Republicans and McCain backers planned to vote on Election Day.

The same pollsters showed Chambliss leading Martin 48 percent to 46 percent, with 4 percent for Buckley.