[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/images/07/11/art.mccainobama.ap.jpg caption="Obama is up over McCain in the latest CNN poll of polls."](CNN) - As the dog days of summer set in and Americans take a break from the daily political band-and-forth, a new CNN analysis of several recent national opinion surveys show Barack Obama with a sizeable lead over John McCain.
In the latest CNN Poll of polls, the Illinois senator holds an 8-point lead among registered voters nationwide, 49 percent to 41 percent, with 10 percent still undecided.
The 8-point spread is up 2 points from a CNN poll of polls released one week ago. It is double the margin it was one month ago, days after the prolonged Democratic race ended.
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“Obama's lead has grown a bit over the course of the past month. It is still relatively slim, but it is certainly solid," CNN Senior Political Researcher Alan Silverleib said. "The burden is on McCain to find a way to shake things up as we enter the traditional summer doldrums.”
The poll of polls consists of three recent surveys from Gallup, CNN/Opinion Research Corp. and LA Times/Bloomberg. It does not carry a margin of error.