50 years ago, my dad told me that FDR knew the attack was coming, and did nothing to prevent it.
It was well documented that the boy/telegram was 10 minutes too late. He had to bicycle uphill.
A loved one once asked a Pearl Harbor survivor about such a possibility--and whether he believed it, or not. He durn near turned violent disgustedly saying 'no way.' Sigh.
None are so blind as those who will not see. It is even more true, today.
Was always told the same by my dad.