"Nixonian," meaning "anything a Republican politician does, which Democrats decide they don't like." For example, using the IRS as a club against one political opponents is Nixonian, if a Republican administration does it. Authorizing the sale of weapons to foreign drug gangs, if a Republican president does it. Lying about legislation to get it passed, and then brow-beating the court into overlooking its unconstitutionality - but only if a Republican does it. Illegally carrying on state business (often involving classified intel) on a private email server, if a Republican does it. Blaming one's own, lethal, foreign policy blunders on a YouTube crank, if a Republican does it.
One could go on at some length.