Which Christian Churches today teach that a Christian should not pursue a highest post in the state? Which Christian Churches today teach that a Christian should not pursue a highest post in the state (like president, chancellor, prime minister, etc.)
Some Baptists and most Anabaptists preach a strict separation of church and state. Historically, this has precluded many from any type of government involvement.

Mennonites and the Amish, for example, in being called out of the world, believe they should have nothing to do with elected or high office.