If you're following the ethical meanderings of members of the U.S. Congress, then this New York Times report on the status to clean-up corruption is important to read. There's plenty to investigate, but there seems to be little action, despite beefed up resources. There's also a new Office of Congressional Ethics with the power to initiate investigations without first having to have a complaint. Why the inaction?
Remember, it was the Democrats in the last election who pointed to the corruption and ethical lapses in the U.S. House of Representatives and U.S. Senate. They blamed Republican-control and they promised to clean it up.