It was originally going to help fix the Articles of Confederation, but instead it ended up creating a new plan for government called the Constitution.
Answer:
The U.S. Supreme Court ruled that Nixon had to release the Oval Office tapes to government investigators. ... The House Judiciary Committee then approved articles of impeachment against Nixon for obstruction of justice, abuse of power, and contempt of Congress.
To my knowledge if he had a reason to resign at that time, he knew he was guilt and he would get what was coming to him...
The answer is most likely- the British were disregarding our rights on the seas by seizing our sailors