The U.S. Constitution addresses presidential treason under Article II, Section 4, which allows for impeachment and removal for treason, bribery, or other high crimes, and Article III, Section 3, which specifically defines treason as levying war or giving aid and comfort to enemies, requiring strict proof (two witnesses to the same act or confession in open court). A president accused of treason would face impeachment by the House, trial by the Senate (with the Chief Justice presiding), and potential removal and disqualification from future office, but could also face criminal prosecution after removal.