[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/08/01/art.mccain0801a.ap.jpg caption="McCain has cut Obama’s lead in half this week in the CNN Poll of polls."](CNN) - John McCain has chipped away at Barack Obama’s lead this week, the latest CNN poll of polls suggests.
CNN Election Center: View the latest state polls
Obama now holds a 3-point lead over McCain in CNN's average of national polls, 47 percent to 44 percent, down from the 5-point margin he held over the presumptive Republican nominee on Wednesday, and half his six-point margin at the beginning of the week in traditionally volatile summer polling.
The poll of polls includes the latest Gallup daily tracking poll, conducted July 29-31, that showed the two candidates tied at 44 percent after several days of back-and-forth between their campaigns over the McCain camp’s tough new anti-Obama ad, and accusations of racial politics on the trail.
“It appears that Obama received a temporary boost from his trip to Europe and the Middle East,” noted CNN Senior Political Researcher Alan Silverleib. “That boost has now faded, but the overall dynamics of the race have not. Obama is still in the lead — as he has been since clinching the Democratic nomination.”
In addition to the Gallup daily tracking poll, the CNN poll of polls also included a Pew poll conducted July 23-27, a USA Today/Gallup survey conducted July 25-27, and a CNN/Opinion Research Corporation conducted July 27-29. The CNN poll of polls does not have a margin of error.