Gallup's week-long tracking poll of likely voters finds that Mitt Romney is leading Barack Obama by 6 percentage points, 51-45.

Among registered voters, the lead is more narrow. Romney has 48 percent of registered voters, while Obama receives 46 percent.

The trend line of voters, especially likely voters, clearly is in Romney's direction:

Of course, this poll does not take into account last night's town hall-style debate between Romney and Obama.

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