The american public and congress did not want to declare war but the president and some staff did.
Without the attack on pearl and the public cry for revenge i doubt it that the congress would even declare war because the public would not like it at all.
I always find it funny that Americans judge the japanese attack on pearl as a violation while at the same time they where violating the rules even more.
But history didnt work out that way, japan did attack the US after being provoked plenty and germany just declared war on the US ( but hitler did more stupid things )
Probably Hitler was hoping that his Japanese allies would do the same against Russia and Stalin.
He would have needed that oriental soviet troops be stuck with Japan.
Yeah, he was hoping that would have happened. If he didn’t declare war on the US, then the War would have been separate still.