Paul Ryan thought he could pull this Healthcare vote off on the first shot. He believed he could whip the votes possible to drive it home. 

The reality is that the conservative wing of the party is not going to budge and the democrats aren’t going to help either. This bill seems to be DOA unless amendments and concessions are made.

From CNN:

After a dramatic 24 hours of tense negotiations and hushed meetings with the conservative House Freedom Caucus and others that failed to produce a closing deal, GOP leadership and the White House finally acknowledged mid-afternoon that the House would no longer vote Thursday on the GOP health care bill.
They simply didn’t have the votes.

The Hill is reporting that Ryan hasn’t even set a time certain for the vote:

Ryan’s press conference, which was originally slated to happen at 11:30 a.m., was rescheduled to 3:30 p.m. on Thursday, before then being postponed indefinitely with the “timing to be announced.”

President Trump needs to play this one safe. Allow conservatives to amend the bill. Find common ground or the Democrats win. 

Anything is better than Obamacare.