Republican plans to repeal and replace the Affordable Care Act, also known as Obamacare, hit a serious snag last week. A planned vote in the U.S. House of Representatives on the GOP replacement plan, called the American Health Care Act, was canceled at the last minute. So what's next in the effort to bring major changes to the nation's health care policies? Will the Republicans try again to replace a law they have maligned for years? And what options does President Trump have through his executive authority to change the way the Affordable Care Act is being implemented?