"Under the health care law, insurance plans in the new markets may cover abortion unless a state passes a law prohibiting them from doing so. Plans offering coverage for abortion, however, may not use federal funds to pay for it."
By law Senators, Representatives, and their staffs must buy insurance thru an Exchange. In Exchange plans, the government thinks it can force plan sponsors and insurers to provide abortion coverage. But also by law, the OPM cannot use federal funds to pay for any plan that provides abortions.
So will members of Congress and their staffs have abortion coverage?
Yes. Unless, no.