Plouffe on conference call says Obama within 300 delegates of clinching Democratic nomination. "Organizing heavily in Guam."

PHILADELPHIA, PA.Obama campaign manager David Plouffe said Wednesday on a conference call that even factoring in the Pennsylvania primary loss, Obama is ahead by 159 delegatesand is less than 300 delegates away from securing the nomination.

“The structure of the race remains the same,” Plouffe said.

To get to the 2,024 delegates needed to clinch the Democratic nomination, Clinton would need to win 70 percent of all the remaining delegates.

We are stronger right now in a match up against McCain,” said Plouffe, citing especially Obama’s strength with younger voters.

Plouffe said the campaign–and how many covering presidential campaigns have ever delt with this–is “organizing heavily in Guam” with a May 3 contest.

Conference call ongoing