As 2016 came to a close, Republican congressional leaders believed they had a basic idea of how they were going to repeal and replace Obamacare. But in the new year, this sense of a broad consensus has collapsed.

Some Republicans want a bill that will repeal all of Obamacare while others want to keep key aspects of it. They are fighting over how many people to try to cover, how much to spend, how much to tax, about the sequence of legislation, and when any sort of repeal would actually go into effect. And that’s just in Congress.