This is correct.
Machiavelli was an Italian political philosopher whose famous work, the Prince, is an in-depth look at what is necessary for a ruler to be effective, both in terms of ruling a people but also in doing what needs to be done.
If I'm not mistaken, it was to protest against the taxes they put
Nixon refused to turn over the tapes during his presidential scandal under the grounds of "<em>the right to privacy"</em> protected by the 4th amendment. However, the 4th amendment didn't apply to him, because he was the leader of the US, and the citizens have a right to know what is going on inside the White House, as decision made in there can affect the people of US.
hope this helps