New episodes in the nation's long-running political drama over health care are coming via your news feed in 2015. The fate of President Barack Obama's health care law again hangs in the balance as the Supreme Court weighs another legal challenge to the program, now covering millions of people. And a Republican-led Congress prepares for more votes to repeal the Affordable Care Act, ignoring threatened vetoes by the president. Five things to know about health care in the year ahead: THE MAIN EVENT: The biggest health care news of 2015 probably won't come from Congress or the White House, but the Supreme Court.