That’s OK FDR knew of the attack. All part of the plan.
Well, they knew something was coming, either in Hawaii or further west. The entrenched communist sympathizers and spies in the various government agencies and on FDR’s staff were doing everything they could to get the war ‘hot’, so as to more directly aid the Soviets.
You’d think this nation would get tired of being played in order to get into wars around the world. It’s been happening since 1898 on a regular basis.
That is in dispute by historians. However, there is good evidence that there was a Soviet agent within FDR's administration (Harry Dexter White) that surreptitiously sabotaged the pre-war treaty negotiations between the Japanese and the US to spark the Japanese to launch the attack. The goal was to cause a conflict between the US and Japan so the Russians would not be forced to fight on two fronts.