Well Trump just made it one.

The more hurriedly they rush it through, the more political capital they're putting at risk. This (as in the whole ball of wax) is already shaping up to be a larger political upset than anything in most Americans' living memory.

There are already a few cracks showing in their ranks. A few senators might defect, it really depends on whether they believe that the short-term toxicity will wear off before 2018 rolls around. And considering how well the Democrats have been doing with these fights over the last couple of months, it's very possible that a few of them will care more about their 2018 plans than about getting on Trump's good side. Especially if there's writing on the wall we don't know about.