It is hard to overestimate the damage the Freedom Caucus has done to the fledgling presidency of Donald Trump, and to the country. By blocking the American Health Care Act of 2017, the conservative group has guaranteed that Americans will struggle forward under the burden of Obamacare. In the next few months insurers will announce their premium hikes for the coming year; chances are, given the continuing withdrawal of major companies from the marketplaces and the ongoing failure of the bill to attract enough young and healthy participants, the new rates will not be pretty. Last year premiums went up...