PRINCETON, NJ -- Gallup Poll Daily tracking for April 3-5 shows 49% of national Democratic voters saying they are most likely to support Barack Obama for the party's presidential nomination, while 46% prefer Hillary Clinton.
Obama has consistently edged out Clinton over the last two weeks, but his advantage has typically been within the poll's margin of error. Obama's average lead over Clinton has been four percentage points during the past two weeks. His biggest lead -- 10 points in March 27-29 polling -- is also his biggest lead since Democratic primary and caucus voting began in January. (To view the complete trend since Jan. 3, 2008, click here.)
When Gallup asks registered voters whom they prefer for president between Obama and Republican John McCain, the candidates tie at 45% each. McCain had previously held a slight advantage in tracking on this measure.
Over the past week, voting preferences between Clinton and McCain have been remarkably stable. Forty-seven percent favor McCain and 45% Clinton. McCain's support has been at 47% for the last week except for one day when it was 46%. Clinton's support has been 45% in each of the last seven days. -- Jeff Jones
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 April 1-5, 2008. For results based on this sample of 4,403 registered voters, the maximum margin of sampling error is ±2 percentage points.
The Democratic nomination results are based on combined data from April 3-5, 2008. For results based on this sample of 1,231 Democratic and Democratic-leaning voters, the maximum margin of sampling error is ±3 percentage points.
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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