He planned the reorganization of his party, which had been outlawed and which, with the return of prosperity, had lost much of its appeal. After his release Hitler reconstituted the party around a group of loyal followers who were to remain the cadre of the Nazi movement and state. Progress was slow in the prosperous 1920s, however, and on the eve of the Depression, the NSDAP still was able to attract only some 2.5 percent of the electoral vote.

With the outbreak of world depression, the fortunes of Hitler's movement rose rapidly. In the elections of September 1930 the Nazis polled almost 6.5 million votes and increased their parliamentary representation from 12 to 107. In the presidential elections of the spring of 1932, Hitler ran an impressive second to the popular World War I hero Field Marshal Paul von Hindenburg, and in July he outpolled all other parties with some 14 million votes and 230 seats in the Reichstag (parliament). Although the party lost 2 million of its voters in another election, in November 1932, President Hindenburg on Jan. 30, 1933, reluctantly called Hitler to the chancellorship to head a coalition government of Nazis, conservative German nationalists, and several prominent independents.

The first two years in office were almost wholly dedicated to the consolidation of power. With several prominent Nazis in key positions (Hermann Goring, as minister of interior in Prussia, and Wilhelm Frick, as minister of interior of the central government, controlled the police forces) and his military ally Werner von Blomberg in the Defense Ministry, he quickly gained practical control. He persuaded the aging president and the Reichstag to invest him with emergency powers suspending the constitution in the so-called Enabling Act of Feb. 28, 1933. Under this act and with the help of a mysterious fire in the Reichstag building, he rapidly eliminated his political rivals and brought all levels of government and major political institutions under his control. By means of the Roehm purge of the summer of 1934 he assured himself of the loyalty of the army by the subordination of the Nazi storm troopers and the murder of its chief together with the liquidation of major rivals within the army. The death of President Hindenburg in August 1934 cleared the way for the abolition of the presidential title by plebiscite. Hitler became officially Fuhrer of Germany and thereby head of state as well as commander in chief of the armed forces.