Democratic U.S. Rep. Alexandria Ocasio-Cortez is responding to Thursday’s U.S. Supreme Court hearing on Donald Trump’s claim he has “absolute immunity” from criminal prosecution because he was a U.S. president, and she delivered a strong warning in response. Trump’s attorney argued before the nation’s highest court that the ex-president could have ordered the assassination of a political rival and not face criminal prosecution unless he was first impeached by the House of Representatives and then convicted by the Senate. But even then, Trump attorney John Sauer argued, if assassinating his pol…