After Obama, Some Health Reforms May Prove Lasting

The Affordable Care Act is in extreme peril, and Mr. Obama will meet with congressional Democrats at the Capitol on Wednesday to try to devise a strategy that can stave off the quick-strike repeal of the health law that Republicans plan for the opening months of the Trump administration. But the transformation of American health care that has occurred over the last eight years — touching every aspect of the system, down to a knee replacement in the nation's heartland — has a momentum that could prove impossible to stop.