This Cato Institute article, Who Are the Villains of the Mortgage Mess? by Daniel J. Mitchell, was published in the LA Times. It is a good summary of the reasons behind the current crisis and who is to blame.

Problem No. 1 — easy-money policy from the Federal Reserve. Blame the Federal Reserve and every politician.

Problem No. 2 — corrupt subsidies from Fannie Mae and Freddie Mac. Blame politicians, mostly Democrats, and especially Barney Frank and Chris Dodd.

Problem No. 3 — the Community Reinvestment Act. Blame Jimmy Carter, the Democrats, Bill Clinton, and George W. Bush.