Clinton projected to win Puerto Rico primary

Though no vote totals have been posted, the networks have projected Sen. Hillary Clinton as winner in today's Puerto Rico primary:

For Clinton, the win provides a quick bounce-back from her campaign's resounding setback on Saturday at the hands of the Democratic National Committee's Rules and Bylaws Committee, which ruled in Obama's favor in a dispute over the seating of the Florida and Michigan delegations, but does little to change the overarching dynamic of the primary fight.

While Clinton will win a clear majority of Puerto Rico's 55 delegates, she will still stand well behind Obama in the overall count. Coming into today's vote, Obama had 2,052 delegates, 66 short of clinching the nomination. Clinton had a total of 1,877 delegates.

Clinton launched new ads in South Dakota and Montana on Sunday asserting that she is the popular vote leader, securing more votes than any previous primary candidate. "Some say there isn't a single reason for Hillary to be the Democratic nominee," says the ad's narrator. "They're right. There are over 17 million of them."

The final primaries, in Montana and South Dakota, will be held Tuesday.