Excellent question! I don't have an excellent answer, though. During "Hillarycare" I do seem to remember more insurance companies digging in against the scheme. (At the time, I was working for one who was actively mounting opposition to Hillarycare) I'm "out of the loop," now (and liking it)
It’s crazy. I haven’t heard a peep from any of them. Except commercials to buy their Medicare policies.