presidente fu'ivla

x1 is the head of x2 (state of a republic, a representative democracy or, more seldom, a dictatorship); x1 is a president of x2 (state/organisation etc.)

See nolraitru, turni, imperatora, gugja'a, kagnyja'a

In notes:

cratse
x1 is a president; x1 is president of x2
demkratiia
x1 is a democracy, polity by the people, as a form of government either directly or through elected representatives