Bob Sullivan: You might think Standard & Poor's has something against the U.S. government, the way the ratings firm treated the nation's credit rating on Friday. In fact, it does. It's hard to view the monumental ratings downgrade in context without understanding the long-running feud between the government and ratings agencies. In April, Sen. Carl Levin, D-Mich., issued a scathing 650-page report contending that malfeasance at ratings bureaus like Standard & Poor's was as much to blame for the housing bubble as any bank, and included a series of smoking gun e-mails that suggested that the firms knew they were profiting from unethical behavior.
