Did Inouye have any sexual assault cases IOTL?
There have been rumors going around about him, but nothing proven.
The actual story is taken from Huma Abedin's recent book, where the Senator in question was unnamed IOTL. I just assumed it was Inouye she was talking about.
Is there anything in her book that suggests him?
I haven't read the book, but she left the Senator in question unnamed, but also stated that the event occurred in 2005.
I could have made it Obama and had him resign and had Hillary elevated to the White House, but that would have been too unrealistic in my opinion. He's way too faithful to Michelle to go around sexually assaulting other Senators's staffers.
Ahh yes, this would be too unrealistic in a timeline with... checks notes... Bill Clinton becoming Senator from New York in 2009