The debate over whether CMS should require providers to participate in demonstrations of Medicare pay bundles is resurfacing as the Trump administration stalls mandatory demonstrations started under former President Barack Obama's CMS. In the past, providers and many Republicans fought against mandatory bundles ; the tables have turned, and those who are for mandatory bundles now are arguing against the new administration's presumed plans to ban them. Republicans and many provider lobbyists say the Affordable Care Act doesn't afford CMS...