Don't call them a czar
Whatever you do just don't call them a "czar"... it is a tired over used term... much like "new normal" or "ground zero"... can we move away from silly buzz words especially titles that do not make sense at all. Aside from the mere fact we spell it incorrectly in the first place.
Czar = an emperor of Russia before 1917. For Example: "the assassination of the tsar and his family"
And below a new definition created because of a our (US) overuse of the term.
Czar - a person appointed by government to advise on and coordinate policy in a particular area. For Example: "America's new drug czar"