Roosevelt could have prevented the Cold War?

Winston Churchill warned President Roosevelt not to trust Stalin and not to let him get to Berlin. Roosevelt did not listen to Churchill. It is doubtful Roosevelt could have stopped him from taking over the Eastern Bloc anyway. It would have been better for Europe if they had not been taken over by the Communists. There are still six countries which are communist countries. The United States had a real issue with communism which is how we ended up in Viet Nam and Korea in another bunch of wars. So I doubt the Cold War would have been prevented with the mindset of the American leaders.