Possibly even worse for Trump, as it also means his core demographic is shrinking; he's losing the few voters he has that are NOT white men, and those who identify as independent.
Consider it like this. If I had ten chocolate cupcakes, and four of them has a strawberry on top while the others had a cherry, it means 40% have cherries. But, if two of the cupcakes with strawberries are eaten, it means 50% now have cherries.
Does that mean the ones with cherries are more popular due to this change? No, it means the change is the result of the larger percentage being removed.
It also means he's not going down unless they're 100% sure he's bringing the party with him.
They had a meeting to try and see if the healthcare bill has the votes, and it looks like it doesn't. The key here is if Ryan wants to push it or not, because if they make a big push and fail it'll hurt them pretty badly.