They cant get 50 so they cant change the rules and they cant repass the 2015 bill that gutted O-care that Obama vetoed.
The only way they can pass it is more seats.
Obama had 60 in the Senate and passed the first version Obama signed with all 60, then the second version mods with 57 losing three,
Dems won lots of new seats in 2008, GOP lost seats in 2016 giving them no room for losing Senators.
It might be possible to get 51 votes with a better bill. Within the reconciliation rules, it’s hard to take out the cadillac plan requirements for you, me, and everyone else. I don’t think the senate parliamentarian is going to agree to that without the nuclear option.
Or maybe the GOP senators are simply afraid to repeal o-care.