My money is on taking the benefit away.
In other words, "Oops, sorry. Our bad." 
Have you noticed how this very thing happened in Bernie's home state, and its being totally ignored ? "Single Payer" was enacted in 2011, and killed at the end of 2014 once the state realized it couldn't pay for it without bucketloads of other people's money.
IIRC it was going to require something like 11% of Vermont's business profits, and 9-10% of everyone's paychecks to make it happen.
So yeah.. - it ended with "Oops, sorry. Our bad." - and magically, nobody seemed to care. Because it's only Democrats involved. If it were a damned, dirty rethug who ended the program in Vermont, there would still be protests on the news nightly.