The Reichstag Fire in February 1933 allowed Hitler to blame communists for a plot against the government, leading to the arrest of 4,000 communists. Hitler used this to push through the "Decree for the Protection of the People and the State," which gave him power to imprison opponents and ban opposition newspapers. He then persuaded President Hindenburg to call a March election, and the Nazis secured two-thirds of the seats by preventing communists from taking theirs. This gave Hitler the power to change the constitution and strengthen his control.