The U.S. Supreme Court on Friday issued a major decision scaling back the power of federal judges to block presidential policies nationwide, in what is considered a major win for the Trump administration’s efforts to end birthright citizenship for children born in the U.

The ruling left unsettled the question of whether children born to immigrants without full legal status in the United States are entitled to automatic citizenship. So what happens now?

The decision prompted confusion and phone calls to lawyers as people who could be affected tried to process a convoluted legal decision with major humanitarian implications.