The Reason Why

All health care policy is unpopular because health care is 1/6 of our economy, but nobody wants to spend 1/6 of their income on it.

— Josh Barro (@jbarro) March 14, 2017

And the GOP proposal is a failure, in part due to its own ineptitude, in part due to Obamacare adding yet another entitlement and difficult to undue, buying into the fundamental top-down approach of Obamacare, and the inherent political intractability of the issue as noted by Barro.