President Donald Trump's sweeping assertions of executive power during his first weeks back in office appear headed toward U.S. Supreme Court showdowns, but it remains an open question whether or how much the justices might act to check his authority.

The Supreme Court majority built by Donald Trump could uphold efforts to expand presidential authority based on the legal principle of unitary executive theory.

Trump’s executive order looks to redefine the constitutional right of birthright citizenship to exclude the children of noncitizens. In your opinion, does he have any legal ground to stand on? No. Now,

The U.S. Supreme Court declined on Thursday to place on hold a dispute over California's standards for vehicle emissions and electric cars even as President Donald Trump's administration considers policy shifts that touch upon pending litigation at the nation's highest judicial body.