Rebuilding of the party

Adolf Hitler (left), standing up behind Hermann Göring at a Nazi rally in Nuremberg, 1928

At the time of Hitler's release, the political situation in Germany had calmed and the economy had improved, which hampered Hitler's opportunities for agitation. Though the "Hitler Putsch" had given Hitler some national prominence, Munich remained his party's mainstay.
The NSDAP and its organs were banned in Bavaria after the collapse of the putsch. Hitler convinced Heinrich Held, Prime Minister of Bavaria, to lift the ban, based on representations that the party would now only seek political power through legal means. Even though the ban on the NSDAP was removed effective 16 February 1925,^[59] Hitler incurred a new ban on public speaking as a result of an inflammatory speech. Since Hitler was banned from public speeches, he appointed Gregor Strasser, who in 1924 had been elected to the Reichstag, as Reichsorganisationsleiter, authorizing him to organize the party in northern Germany. Strasser, joined by his younger brother Otto and Joseph Goebbels, steered an increasingly independent course, emphasizing the socialist element in the party's programme. The Arbeitsgemeinschaft der Gauleiter Nord-West became an internal opposition, threatening Hitler's authority, but this faction was defeated at the Bamberg Conference in 1926, during which Goebbels joined Hitler.
After this encounter, Hitler centralized the party even more and asserted the Führerprinzip ("Leader principle") as the basic principle of party organization. Leaders were not elected by their group, but were rather appointed by their superior, answering to them while demanding unquestioning obedience from their inferiors. Consistent with Hitler's disdain for democracy, all power and authority devolved from the top down.
A key element of Hitler's appeal was his ability to evoke a sense of offended national pride caused by the Treaty of Versailles imposed on the defeated German Empire by the Western Allies. Germany had lost economically important territory in Europe along with its colonies, and in admitting to sole responsibility for the war had agreed to pay a huge reparations bill totaling 132 billion marks. Most Germans bitterly resented these terms, but early Nazi attempts to gain support by blaming these humiliations on "international Jewry" were not particularly successful with the electorate. The party learned quickly, and soon a more subtle propaganda emerged, combining antisemitism with an attack on the failures of the "Weimar system" and the parties supporting it.
Having failed in overthrowing the Republic by a coup, Hitler pursued a "strategy of legality": this meant formally adhering to the rules of the Weimar Republic until he had legally gained power. He would then use the institutions of the Weimar Republic to destroy it and establish himself as dictator. Some party members, especially in the paramilitary SA, opposed this strategy; Röhm and others ridiculed Hitler as "Adolphe Legalité".