How did Adolf Hitler get elected president?

Chancellor was the top man in German Politics ( still is, they also have a president but he is a lower-level official, no US equivalent. Sorry to relate , Adolf Hitler was legitimately elected by the voting populace of Germany to the post of Chancellor- which once in, he expanded to Fuhrer ( Leader) and ReichsKanzler- Imperial or Realm chancellor- de facto- Dictator. Adolf was elected by the people- He did not March into Berlin with a Tank convoy! This is one of the tragic failures of ( People"s Government). In a different vein the Italian Empire was ditched- not by Mussolini ( he was already dead) the Communists, or the Neo-Nazis- but by our old friend (?) the Ballot Box- in l946.