Obama campaign manager David Plouffe held a conference call with reporters today, and mostly looked ahead at the path to the nomination. By the campaign's math, Clinton netted between 10 and 12 delegates in Pennsylvania. With nine remaining contests, they figure she will need to win 70 percent of the remaining pledged delegates to erase Obama's lead. With the Democratic Party's proportional delegate allocation process, this is highly unlikely to occur.

Of course, even the Clinton campaign knows this. Their strategy must be to cut down the popular vote deficit, and use that to influence enough undecided superdelegates to support Clinton for her to reach the magic number of 2,024 total delegates. Plouffe argues that to bring Obama's pledged delegate lead down to even 100, Clinton would need to win 57 percent of the remaining pledged delegates; and to reach 2,024 delegates, Clinton would then need to win "a huge majority of the undecided superdelegates," something he feels is highly unlikely.

The campaign expects the race to go through the final primaries in June, but that by the end of the process the remaining superdelegates will see Obama's insurmountable pledged delegate lead and ultimately support him.

"At the conclusion of these primaries on June 3, we're going to be a very manageable number away from the nomination, and we're increasingly going to focus on that," Plouffe said. "Let's move away from the theoretical into the world of reality here."