Why is Hillary suddenly so magnanimous? The payoff.

The payoff:

Clinton will likely seek help from Obama in retiring her massive campaign debt, which has swollen to more than $30 million, including $11 million she lent the effort, advisers said Thursday.

The former first lady, who plans to bow out of the race and endorse Obama on Saturday, told donors she will raise money for Obama's campaign, both to help the Democratic Party's cash position and to expand the Illinois senator's prodigious fundraising base. Her advisers estimate the former first lady could bring in $50 million to $100 million for the general election campaign — and much more if she were named Obama's running mate.

The advisers spoke on condition of anonymity because they were not authorized to discuss the matter publicly.

Clinton hosted a conference call Thursday with her national finance committee, urging them to shift gears and begin raising money for Obama and for the Democratic National Committee, which will be coordinating fundraising efforts with the Obama campaign.