I agree with what you are saying. But US materiel could have come with or without an actual war declaration. Actually, war was declared by Germany on December 1

I agree with what you are saying. But US materiel could have come with or without an actual war declaration. Actually, war was declared by Germany on December 11, 1941, and the USSR was declared eligible for lend-lease aid on November 7, 1941. Declaring war on the US or not, Hitler would have still dealt with (partially) US funded Soviets just because it attacked the USSR in June 22, 1941 so that is not an argument. Of course, it's hard to judge, as aid can (and was) accelerated.