First, it was Republicans who introduced the idea that Members must move from the regular Federal Health Care cafeteria plan and be limited to plans under the new exchange.
Members and staff receive between 72 and 75% insurance premium subsidy from their employer (The US Government).
As others have previously pointed out, dear Marcus must be automatically covered regardless of current health if she elects to purchase insurance under the exchange. Why? Because the ACA prohibits limitations for pre-existing conditions.
But here is the most important fact Bachmann either ignores, or is too stupid to know: