(CNN) - After a string of surveys that seemed to indicate John McCain was reducing Barack Obama's polling edge, the most recent numbers added to the latest CNN poll of polls suggest the Democratic nominee is holding on to his advantage nationally.
A new CNN Poll of Polls compiled Thursday evening indicates that 50 percent of likely voters are backing Obama for president, with 43 percent supporting McCain and 7 percent undecided.
The previous poll of polls, compiled earlier Thursday, suggested that Obama held a 5 point lead over McCain.
Election Center: Check out the latest state polls
This latest edition of the poll of polls is an average of eight national surveys: CBS/New York Times (October 25-29), Fox/Opinion Dynamics (October 28-29), ARG (October 25-27), ABC/Washington Post (October 26-29), Reuters/C-SPAN/Zogby (October 27-29), Gallup October 27-29), Diageo/Hotline (October 27-29) and IBD/TIPP (October 25-29).