During the first years of world war 2 the us government changed it's foreign policy but by September 1940 he supported all aid short of war what caused this change?

In the early years of World War II, the U.S. government shifted its foreign policy due to the growing threat posed by Axis powers, particularly after the fall of France in June 1940. The realization that Britain was on the brink of defeat and that American security was at risk prompted President Franklin D. Roosevelt to support measures like the Lend-Lease Act, which aimed to provide military aid to allies. This change reflected a broader understanding that aiding nations fighting fascism was crucial for the defense of democracy and ultimately American interests.