In an election for President of the United States in Pennsylvania today, 10/07/08, four weeks to the vote, Democrat Barack Obama defeats Republican John McCain 55% to 40%, according to a SurveyUSA tracking poll conducted exclusively for WCAU-TV Philadelphia, KDKA-TV Pittsburgh, WNEP-TV Scranton, WHTM-TV Harrisburg, and WJAC-TV Johnstown. Compared to an identical SurveyUSA poll released twelve days ago, Obama is up 5 points; McCain is down 4.
Among white voters, who make-up 87% of PA's electorate, Obama had trailed by 3, now leads by 4 -- a 7-point swing to the Democrat, which, when combined with Obama's now 24:1 advantage among black voters, puts Obama in prime position to capture the 21 Keystone Electoral Votes as the two candidates head for home.

Obama today leads among PA men and women, young and old, rich and poor, more educated and less educated. McCain leads among Republicans, conservatives, pro-life voters, and gun owners. 21% of Republicans cross over to vote for Obama; 16% of Democrats cross over to vote for McCain. Independents break 2:1 for Obama.

Obama leads 2:1 in the Philadelphia area, leads by 10 points in the Scranton area, and nominally in the Pittsburgh area. McCain leads by double digits in Harrisburg and ties Obama in Johnstown.