As he contemplated the ruination of his presidency last week, the Richard Nixon displayed on the transcripts was surely musing on the legal liabilities he might face whenever he again becomes a private citizen. The range of possible difficulties is formidable. While Special Prosecutor Leon Jaworski was able to persuade a grand jury that it could not indict a sitting President, his arguments do not apply to a former President. And if the President is impeached and convicted, the Constitution explicitly notes that criminal charges can still be brought.
Based on the evidence...