Some Surveys Indicate Tighter Presidential Race

"A spate of widely publicized newspaper and network polls over the past week have shown Barack Obama opening a big lead over John McCain. But other surveys tell a somewhat different story, suggesting the presidential race is still close, and the Republican has even gained ground in recent days. The reason for the divergence: Pollsters are facing new challenges this year, trying to gauge whether the electorate is changing, and how much." Some Surveys Indicate Tighter Presidential Race