Deep Throat

I'm not sure where people that try to make out Mark Felt as some sort of vow-breaking slime ball get off...

The paramount thing he swore to as a agent of the federal gov't was to uphold and PROTECT the Constitution of the United States of America -- not the United Paranoia of Richard Nixon or the FBI code of conduct...

Few federal servants (military folks excluded) have so directly done such service to their oath.