A few days ago Newt Gingrich wrote a jeremiad against the Congressional Budget Office, which acts as the official scorekeeper for the effect of proposed legislation. The CBO, he said, was obsolete, corrupt, left-wing, etc. etc. and simply didn't know how to account for a dynamic, entrepreneurial, red-tape-cutter like Donald Trump.
Gingrich's real problem, of course, is that the CBO is required to stick close to reality, which means that it often produces projections and estimates that are inconvenient for Republicans. Take today, for example. Senate Democrats asked for an estimate of what would happen if Obamacare were repealed. Here's the CBO's answer:
That is inconvenient, isn't it? This is what happens if you eliminate Obamacare but keep in place the ban on pre-existing conditions—which Republicans all say they support and which they can't repeal anyway. Premiums would skyrocket, 32 million people would lose coverage, and insurers would abandon about three-quarters of the country.
This is what Republicans need to address with their "replace" plan. But they can't do it and they know it.