WASHINGTON - Nobody expects to get a letter from a member of Congress that ends with an expletive. But that's what happened when Rep. Jo Ann Emerson (news, bio, voting record), R-Mo., recently corresponded with a resident of her southeast Missouri district. The letter ended with a profane, seven-letter insult beginning with the letter a — "i think you're an. ..." Emerson says she can't explain how the offensive language made it into the letter, which otherwise reads like a typical response to a citizen's question about last year's testimony of oil executives before the Senate Commerce Committee. "There is...