At a news conference last week, President Trump joined the bipartisan chorus calling for a national fix for the aggravating and costly nuisance of surprise medical bills. The principles the president laid out to protect consumers, while vague, point in the right direction, which is to say they would require the industry to take responsibility for solving most of the problem. Unfortunately, some of the ideas under consideration in Congress would go in the wrong direction. It is important to get this policy right for the precedents that will be set for the future.