I’m at the Obama rally at 52nd and Locust Street in West Philadelphia. Up to 20,000 people could show up, with Obama set to speak at 1:10 PM.

The crowd is certainly friendly Obama territory, as it is mostly comprised of young people and African-Americans.

This is part 4 of an all-morning swing through Philly, which included stops at Temple University, northeast Philly, and northwest Philly.

The crowd is very, very energized, with attendees singing and dancing in anticipation of his arrival.

Perhaps more than any reason, Obama is in west Philly to energize his closest supporters to turn out on election day. With just 3 weeks and 4 days to go, Obama is depending on high turnout in urban Philadelphia to surge past McCain’s rural base and give him a clear win in Pennsylvania.