The debate over U.S. health care reform and the future of the Affordable Care Act dominated headlines in 2017, but that subject could take a backseat this year as the Trump administration faces other challenges, according to Robert I. Field , professor of law and health care management at Drexel University, who is also a lecturer at Wharton. “They’ve got to keep the government funded; they’ve got to deal with Children’s Health Insurance Program (CHIP); they’ve got to deal with the cost sharing reductions under Obamacare,” he said, listing some of the issues legislators would face in the year ahead. Field and Wharton health care management professor Mark Pauly recently appeared on the Knowledge at Wharton show  on Wharton Business Radio on SiriusXM channel 111 to discuss the key issues facing U.S. health care in 2018.  Here are the key points from their conversation.…