I think the West Coast would have been way too long a stretch for Japan, Don. Way too long. Not realistic. And the East Coast for the Germans? Well...they would have had to take England and defeat Russia first (then take 2 or 3 years to build a huge Atlantic navy) and they could not succeed in any of those objectives...even before the USA was in the war. Their effort to invade England had failed by Sep 1940. Their effort to conquer Russia failed before the gates of Moscow in the bitter winter of Dec 1941. The handwriting of German defeat was on the wall long before the first American soldiers set foot in Europe. The Germans took on too many opponents. By the time Normandy happened, they had already lost the war, and no doubt about it. They could still fight, but they could not win.