PRINCETON, NJ -- Barack Obama has extended his lead over Hillary Clinton among Democrats nationally to 52% to 42%, the third consecutive Gallup Poll Daily tracking report in which he has held a statistically significant lead, and Obama's largest lead of the year so far.
The latest results are based on Gallup Poll Daily tracking conducted March 27-29. Obama did particularly well in interviewing conducted on March 29.
This marks the first time either candidate has held a double-digit lead over the other since Feb. 4-6, at which point Clinton led Obama by 11 percentage points. (To view the complete trend since Jan. 3, 2008, click here.)
According to tracking interviews from March 25-29, John McCain continues to hold a small 4-point lead over Clinton among national registered voters. McCain leads Obama by three points, 47% to 44%. -- Frank Newport
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 March 25-29, 2008. For results based on this sample of 4,407 registered voters, the maximum margin of sampling error is ±2 percentage points.
The Democratic nomination results are based on combined data from March 27-29, 2008. For results based on this sample of 1,228 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.
To receive Gallup Poll Daily tracking reports each day as soon as they are published, please register here and add Gallup Daily to your e-mail subscriptions.