Sen. Lisa Murkowski on disagreeing with the president

Few Republicans disagree publicly with President Trump more than Alaskan Sen. Lisa Murkowski. She has diverged from the White House stance on health care, the environment and the Supreme Court, among other issues. Now Murkowski is bucking her party by refusing to support Trump’s national emergency declaration over funding for a wall on the U.S.-Mexico border. She talks to Judy Woodruff about why.