This paragraph makes no sense. If you put Obamacare funding in a bill with other "must pass" funding, it gives easy cover to everyone. Even Republicans will not oppose "must pass" funding. How would this force Democrats to make a "dodgy political decision?" Many times in the past, Republicans have let onerous Democrat programs slip through because those programs were part of a bigger bill that they were afraid to oppose.
If you put it in must-pass legislation, the Dems showed two years ago that they don’t care about electoral outcomes if they can entrench a program. It would be foolish to bet that sen Dems would ever reject the bill. Rather, just as the House Dems did, they would permit just enough to vote no while still ensuring passage.