Add Yahoo as a preferred source to see more of our stories on Google. The case is a major test of a key pillar of Mr. Trump's immigration agenda and is the first in which the high court will weigh the legal merits of one of the president's immigration policies

The Trump administration has brought one of its biggest constitutional challenges so far to the Supreme Court, asking the justices to overhaul birthright citizenship as it has been known in the United States for the past 150 years. Trump's argument against ...