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Gallup Daily: Obama Up by 3 on McCain

Gallup Daily: Obama Up by 3 on McCain

Preferences have been stable this month

PRINCETON, NJ -- Barack Obama has a three percentage point advantage over John McCain in the latest Gallup Poll Daily tracking update of registered voters' presidential preferences, 46% to 43%.

These data are based on Aug. 11-13 polling, and reflect a stable period for voter preferences. Since the beginning of August, Obama's support been either 46% or 47% for all but one day of Gallup tracking (48% in Aug. 10-12 polling) and McCain's has been 42% or 43% for all but one day (44% in Aug. 3-5 polling).

Although McCain has continued to campaign in battleground states such as Michigan and Pennsylvania, Obama has been on vacation in Hawaii and the presidential campaign has largely been overshadowed in the news by the Russia-Georgia conflict and the summer Olympics.

The 3-point Obama advantage matches the average in Gallup Poll Daily tracking since he clinched the Democratic nomination in early June. (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 Aug. 11-13, 2008. For results based on this sample of 2,673 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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