 The blockade was caused, in part, by early local elections of October 1946 in which the Socialist Unity Party of Germany (SED) was rejected in favor of the Social Democratic Party, which had gained two and a half times more votes than the SED.The United States, Britain, France, Canada, Australia, New Zealand and several other countries began a massive "Berlin airlift", supplying West Berlin with food and other supplies.The Soviets mounted a public relations campaign against the western policy change and communists attempted to disrupt the elections of 1948 preceding large losses therein, while 300,000 Berliners demonstrated and urged the international airlift to continue.