Bill Clinton’s picture is again a fixture on cable news. Republicans are sternly demanding a special prosecutor. And legal commentators are bickering over the finer points of federal criminal statutes on bribery and graft. It feels like 1997—but it’s 2010. And Barack Obama can’t be happy. The White House’s confirmation Friday that it enlisted former President Bill Clinton in an effort to get Rep. Joe Sestak out of the Pennsylvania Senate primary has sent the regular players in Washington’s scandal industry to their battle stations – to pick over the very sort of insider special dealing that Obama had promised...