Roosevelt's foreign policy shifted to one of increased support for the Allies in response to Germany's attack on the Soviet Union. He began to provide more aid to the Allies, including the Soviet Union, and he also began to call for a declaration of war against Germany. This shift in policy was supported by the American public, who had become increasingly concerned about the threat posed by Nazi Germany. The attack on the Soviet Union also galvanized public opinion in favor of the Allies, as the Soviet Union was seen as a bulwark against the spread of fascism.
