Showdown in San Juan?

With Super Tuesday in the books and no clear winner on the Democratic side, it looks increasingly like the delegate-by-delegate war of attrition might continue all the way to the convention. Why, then, is nobody talking about Puerto Rico and its delegates?

Puerto Rico, the final contest in the nomination process, caucuses on June 7, over two weeks after Oregon and Kentucky divvy up their 125 delegates. In Puerto Rico, 63 delegates—more than were at stake in Iowa or New Hampshire—are up for grabs. Is it possible that Hillary Clinton and Barack Obama could spend the final days of the campaign crisscrossing the Caribbean island?