Former President Donald J. Trump has weathered scandals by keeping his intentions under wraps, but recent testimony paints a stark portrait of a man willing to do almost anything to hang onto power. "Any doubts about what was really going through Mr. Trump’s mind on that day of violence seemed to have been eviscerated by testimony presented in recent weeks by the House committee investigating the Capitol attack — especially the dramatic appearance last week of a 26-year-old former White House aide who offered a chilling portrait of a president willing to do almost anything to hang onto power."