[cnn-photo-caption image= http://i.cdn.turner.com/cnn/2008/images/06/12/art.obamapoll.gi.jpg caption="Obama us ahead in the latest CNN poll of polls."](CNN) - Barack Obama is continuing to extend his lead over John McCain in a head-to-head matchup nationwide, a new CNN poll of polls indicates.
Check out the latest polls in the CNN Election Center
The Illinois senator now holds a 5 point lead over McCain among registered voters, 48 percent to 43 percent. In a CNN poll of polls conducted earlier this week, Obama's lead stood at 4 points, and in an average of national polls shortly before Hillary Clinton dropped out of the presidential race, Obama only held a 3 point lead over the Arizona senator.
The poll of polls consists of three recent surveys by Gallup, NBC/Wall Street Journal, and CNN/Opinion Research Corporation. The CNN poll was conducted entirely before Clinton formally gave up her White House bid on Saturday.