You can go even farther back in time. If the US hadn't massively relieved the famine in Russia in 1920/21 there might have been a chance, Lenin and the Bolshevik regime wouldn't have survived.
I'm sorry but famine help is a good thing, not saving millions of people because it might potentially overthrow a government 'somehow' isn't a great plan.
One can argue FDR later embrace of Soviets was way to early and a direct stab in the back to France and other European powers.
You can go even farther back in time. If the US hadn't massively relieved the famine in Russia in 1920/21 there might have been a chance, Lenin and the Bolshevik regime wouldn't have survived.
https://en.wikipedia.org/wiki/Russian_famine_of_1921%E2%80%9...