Answer:
To stay in power Hitler used propaganda, ultra-nationalism, and hollow promises. First, the use of propaganda was exponential. The people of Germany were fed Nazi ideals and only Nazi ideals. This branch of Hitler's government was run by Joseph Goebbels. He held the position of Chief Propogandist of the Nazi Party. Secondly, Hitler's charismatic nature and exceptional oratory skills allowed him to revive the nationalism of Germany after WW1. I say revived, but in many ways, he created an entirely new Germany which was completely loyal to him. Lastly, Hitler promised things such as a "thousand-year Reich" and he brought the people of the nation out of the Great Depression. So, from the outside looking in Hitler was and is still seen as an evil man. However, to the German people at that time he was their savior... their messiah. So, maintaining control of a country that idolizes you is not particularly hard if you use the right tools.
Step-by-step explanation:
Along with those three topics, he also had a scapegoat, which is a target for the people, so they do not focus on his (Hitler) dealings. This scapegoat was the Jewish people of Germany.