A Chequer-Board of Nights and Days

The presidential race tightened after the final debate, with John McCain gaining among whites and people earning less than $50,000, according to an Associated Press-GfK poll that shows McCain and Barack Obama essentially running even among likely voters in the election homestretch.

The poll, which found Obama at 44 percent and McCain at 43 percent, supports what some Republicans and Democrats privately have said in recent days: that the race narrowed after the third debate as GOP-leaning voters drifted home to their party and McCain's "Joe the plumber" analogy struck a chord.

Three weeks ago, an AP-GfK survey found that Obama had surged to a seven-point lead over McCain, lifted by voters who thought the Democrat was better suited to lead the nation through its sudden economic crisis.

The contest is still volatile, and the split among voters is apparent less than two weeks before Election Day.

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Contrary to other polls, some of which show Obama ahead by double digits, the IBD/TIPP Poll shows a sudden tightening of Obama's lead to 3.7 from 6.0. McCain has picked up 3 points in the West and with independents, married women and those with some college. He's also gaining momentum in the suburbs, where he's gone from dead even a week ago to a 20-point lead. Obama padded gains in urban areas and with lower-class households, but he slipped 4 points with parents.

And in the event that people are wondering why McCain is contesting Pennsylvania, I give you this:

An internal Barack Obama campaign poll has the Democrat ahead of John McCain by just two percentage points.

WILK radio host Steve Corbett said Tuesday he obtained an Obama campaign e-mail about the internal poll showing a tight race.

I recognize that there are plenty of people interested in making this a coronation, not an election. Alas for them, the voters may still have something to say about the matter.