Hitler gained power “legally” and then made changes to secure and increase it until he was a dictator
Mussolini was democratically elected, then secured and increased his power until he was a dictator
Trump will try to get elected, then try to secure and increase his power until he is a dictator
Most institutions follow the laws, so a person trying to seize power by force will have to fight much harder that someone that gains power through normal means, and then manipulates said institutions from the inside