On Monday, the Supreme Court ruled that former President Donald J. Trump is entitled to broad immunity from criminal prosecution for actions that he took while in office. Adam Liptak, who covers the Supreme Court for The New York Times, explains how that ruling will weaken the federal case against Mr. Trump for trying to overturn the last U.S. presidential election, and will drastically expand the power of the presidency itself. Guest: Adam Liptak, a Supreme Court correspondent for The New York Times.