[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/11/02/art.map.jpg caption="CNN moved Montana to a 'toss up' state Sunday."]
(CNN) - Call it the battle for Big Sky country.

George W. Bush won Montana by 20 points in his re-election victory four years ago. But it seems the times have changed in the state.

CNN's new Electoral College map, updated Sunday morning, moves Montana from "lean John McCain" to "toss up." The move is partially based on our new CNN Poll of Polls in Montana, compiled Friday, which suggests McCain, the Republican presidential candidate, has a one-point lead over his Democratic rival Barack Obama, 46 percent to 45 percent. Nine percent of voters are undecided.

"The fact that Montana is up for grabs has to be extremely unsettling for the McCain campaign," said CNN Senior Political Researcher Alan Silverleib. "Montana's usually a reliably Republican state in presidential campaigns. It's been won by the Democrats only twice in the past half century. If you're a Republican and you're fighting for Montana in the last few days of the campaign, you're not in good shape."

Three electoral votes are at stake in Montana, a state Obama visited in late August. McCain has not campaigned in Montana during the general election.

With Montana moving to "toss-up," CNN estimates that if the election were held today, Obama would win states worth 291 electoral votes - more than enough to capture the White House

McCain would take states worth 157 electoral votes, while states worth a combined total of 90 electoral votes would still be up for grabs. A candidate needs 270 electoral votes to win.

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[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/11/02/art.obama.gi.jpg caption="Obama has a lead in CNN's final poll."]

(CNN) - Two and seven: With two days left until election day, a new national poll suggests that Barack Obama holds a seven-point lead over John McCain in the race for the White House.

In the CNN/Opinion Research Corporation survey, released Sunday morning, 53 percent of likely voters say they are backing Obama, a Democratic senator from Illinois, for president, while 46 percent support McCain, a Republican senator from Arizona.

Over the last month, Obama's lead has remained quite steady, ranging from five to nine points in the CNN Poll of Polls, which is an average of the national surveys.

But CNN Polling Director Keating Holland cautions against assuming the election is over.

"Keep in mind that this is not a prediction of the final outcome," Holland said. "That's not an easy task with two full days of campaigning to go in a country in which roughly one in ten voters tend to make up their minds in the last few days."

There are three major third-party candidates that are on the ballot in some states across the nation.

They are Independent Ralph Nader, Libertarian candidate Bob Barr, and Green Party candidate Cynthia McKinney.

When they are factored into the poll, Obama's lead increases by one percentage point, to eight points - 51 percent to 43 percent, with Nader, Barr and McKinney combining for four points.

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