News broke last week that Rahm Emanuel, now White House chief of staff, lived rent-free for years in the home of Rep. Rosa De Lauro, D-Conn. — and failed to disclose the gift, as congressional ethics rules mandate. But this is only the tip of Emanuel's previously undisclosed ethics problems. One issue is the work Emanuel tossed the way of De Lauro's husband. But the bigger one goes back to Emanuel's days on the board of now-bankrupt mortgage giant Freddie Mac. Emanuel is a multimillionaire, but lived for the last five years for free in the tony Capitol Hill townhouse...