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Gallup Daily: Obama Leads McCain by Six Points
Politics

Gallup Daily: Obama Leads McCain by Six Points

Lead is among the largest Obama has held over McCain

PRINCETON, NJ -- The latest Gallup Poll Daily tracking update on registered voters' general presidential election preferences finds Barack Obama with a 47% to 41% lead over John McCain.

These results are based on July 18-20 polling, including two days since Obama began his much publicized overseas trip to visit the Middle East, Afghanistan, and Europe. It is unclear at this point whether the trip will boost Obama's poll standing, but his performance in Sunday interviewing was one of his stronger in Gallup Poll Daily tracking, and his current six percentage point lead is among the largest he has held over McCain to date. Tuesday's Gallup Poll Daily tracking report will be the first in which all interviews were conducted since Obama began his trip abroad.

Since Obama clinched the Democratic presidential nomination in early June, he has typically held an advantage over McCain, which has averaged three points, but been as large as seven points.

The current results also mark the first time in more than three weeks that McCain's share of the trial heat vote has not been in the 42% to 44% range. In fact, it matches a June 7-9 reading as McCain's lowest level of support since Gallup began tracking general election preferences in March. (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 July 18-20, 2008. For results based on this sample of 2,653 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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