Gallup Daily: Obama 46%, McCain 42%

Race had been precisely tied in last three reports

PRINCETON, NJ -- The latest Gallup Poll Daily tracking presidential trial heat, based on July 25-26 and 28 interviewing, finds Barack Obama moving slightly ahead of John McCain, 46% to 42%.

Registered voters' preferences had been evenly divided in the prior three Gallup Poll Daily tracking releases. Obama has now pushed slightly back ahead after a stronger showing in Saturday's polling, mirroring the slight advantage he has held for much of June. The polling was the first Gallup had conducted following the "Unity" rally in which Obama and former Democratic nomination rival Hillary Clinton publicly campaigned together.

The presidential race has been close since Gallup began tracking general election preferences in March. The largest lead for either candidate has been just seven percentage points, for Obama after Clinton decided to suspend her campaign. (To view the complete trend since March 7, 2008, click here.) -- Jeff Jones

Survey Methods

For the Gallup Poll Daily tracking survey, Gallup is interviewing no fewer than 1,000 U.S. adults nationwide each day during 2008.

The general-election results are based on combined data from June 25-26 and 28, 2008. For results based on this sample of 2,644 registered voters, the maximum margin of sampling error is ±2 percentage points.

Interviews are conducted with respondents on land-line telephones (for respondents with a land-line telephone) and cellular phones (for respondents who are cell-phone only).

In addition to sampling error, question wording and practical difficulties in conducting surveys can introduce error or bias into the findings of public opinion polls.

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