Persona non grata
Various foreign diplomats have been declared "Persona non grata". This is a most serious type of censure to those otherwise protected by diplomatic immunity from arrest and prosecution.
Other famous examples of people who have been declared "Persona non grata" include the 1952 American Ambassador to Russia, George F. Kennan.
In 2008 the President of Bolivia, Evo Morales claimed that the U.S. government conspired against him and supported his opponents and subsequently declared U.S. Ambassador Philip Goldberg "Persona non grata."