Once Hitler was established Chancellor of Germany, he did everything by the book. He followed the Constitution of the Weimar Republic – the name attributed to Germany in its Constitution – to the letter.
But gradually, he stripped away freedom of the press – he accused the media of fabrications (sound familiar?) – he cajoled the Reichstag and the Reichsrat – equivalent of Congress and the Senate here in US – to give him plenary power for a period of 4 years “in order to defend Germany against its enemies” (Hitler’s justification for the request). And the Legislative Branches gave him unfettered power.
It then became clear to all – including members of the Reichstag and the Reichsrat – that Adolf Hitler had hijacked the country and was now governing as an authoritarian, a dictator. Even the Legislators were stripped of their ability to regain the power allotted to them by the Constitution because, you know, they just gave Hitler plenary power for a period of 4 years. Translation: during a period of 4 years, no one could question what the Chancellor did, no matter what that was. Because for a period of 4 years, he did not have to answer to anyone; he did not answer to anyone.