Regarding the Grassley amendment to Obamacare which forces Congress to insure itself via Obamacare...
So the only ambiguity (and exemption) is regarding staff for Congressional leadership and committees. Remember, Obamacare was designed for people who aren't covered by their employer. It should never have been applied to Congress in the first place since Congress is employed by and was insured by the government. It's like arguing that Congress should place itself on welfare. While it may sound attractive ;-) it doesn't make any sense. Nevertheless, Congress is not exempt from Obamacare, only certain categories of staffers are.