Puerto Rico and the Primaries. Michael Barone notes that Puerto Rico, a late-deciding caucus state with a strong governor, may well have very strong bargaining power in the Democratic presidential nomination, because it will be effectively winner-take-all and has 63 delegates, more than Georgia or New Jersey.

I can imagine the following scenario. Hillary Clinton’s delegate margin over Barack Obama rises and falls a bit from week to week, depending on primary results. Her margin among superdelegates, around 100, fails to increase much because party and public officeholders are wary of offending Obama’s youth and black constituencies. Then, presto! In early June, Puerto Rico’s 63 delegates put her over the top. She has her majority and goes about the business of choosing a vice presidential candidate.