The recent buzz that one of the frontrunners to be Republican presidential contender Mitt Romney's vice presidential pick, Sen. Rob Portman of Ohio, had registered as a foreign agent for the Duvalier dictatorship in Haiti came from American Bridge 21^st Century, a super PAC that's spent most of its money not on attack ads, but on opposition research.

The registration was old news: A July 17 Washington Post profile of Portman, seen at right, noted it, along with a Patton Boggs attorney's statement that, though registered, Portman hadn't represented Haiti. But it shows that independent ...