I think Michael Barone is on to something: Puerto Rico's June 7 primary and its 63 delegates could be the last minute boost of adrenaline that Hillary Clinton's campaign needs.

At the same time, I'm not as easily convinced that the vote will be rigged so as to avoid allocating the delegates proportionally. The DNC is paying close attention to the rules, and the media will as well, and if the delegates are awarded as the result of internal politics, the victory won't mean much. On the other hand, delegates are delegates, no matter how they are won.

By the way: PR votes by caucus.

We want to hear what you think about this article. Submit a letter to the editor or write to letters@theatlantic.com.