Harry Truman accepted the full responsibility of his office. He recognized that as president he was responsible for everything he said and did. He could not and did not attempt to blame other people for his decisions. That’s called maturity.
trump, on the other hand, shows no signs of any sort or degree of maturity and neither do the trumpies who attempt to speak for him. They keep saying this isn’t relevant or that isn’t relevant, let’s get to the real issues. They show that they simply have no idea at all what it means to be accountable for one’s words and deeds.
What could be a more serious failure for a president who is incapable of holding himself accountable for all he says and does?