Whenever a mainstream media outlet mentions a “little-known provision” of campaign finance laws, it is a must-read article:

Clinton loaned her struggling campaign $11 million in recent months. A little-known provision of a 2002 campaign- finance law cosponsored by McCain prevents candidates who drop out of the race from raising money after the nominating conventions to repay themselves for personal loans.

I suspect that there is not much “little-known” about the details of the Bipartisan Campaign Reform Act of 2002 at this point, but it makes for an interesting angle in the story.