This news, plus the sinking of American ships by German submarines, swung American opinion towards entering the war against the Germans. Even though President Woodrow Wilson campaigned for the presidency on his promise to keep America out of World War I, he pushed Congress to declare war on Germany on April 2, 1917. The addition of the United States to the Allies tipped the power in their favor. | This news, plus the sinking of American ships by German submarines, swung American opinion towards entering the war against the Germans. Even though President Woodrow Wilson campaigned for the presidency on his promise to keep America out of World War I, he pushed Congress to declare war on Germany on April 2, 1917. The addition of the United States to the Allies tipped the power in their favor. |