"After Watergate, I never expected another impeachment investigation of a president in my lifetime, let alone an actual impeachment and a Senate trial. Nixon's successors, I thought, would recognize the price of scandal and learn the two fundamental lessons of Watergate. First, if there is questionable activity, release the facts, whatever they are, as early and completely as possible. Second, do not allow outside inquiries, whether conducted by prosecutors, congressmen or reporters, to harden into a permanent state of suspicion and warfare. But the overwhelming evidence is that five presidents after Nixon didn't understand these lessons. It wasn't that they lacked the political skill. Four of these presidents had mastered American electoral politics to win political power, and Ford almost did. Of the five, Reagan managed his problems best, although belatedly, when, after three months of Iran-contra, he permitted a broad internal White House investigation of his own actions. Why did they not see that they would be held fully accountable for their exercise of power?"