I am not sure about Clinton, but Trump definitely knew.
He said about Epstein - "I’ve known Jeff for 15 years. Terrific guy,” . He’s a lot of fun to be with. It is even said that he likes beautiful women as much as I do, and many of them are on the younger side.”
Trump was partying with him and pointing to young and possibly underaged women and making vulgar comments - its on video.
He also wrote him a birthday cards and said "may every day be another wonderful SECRET" - what possible secret could he be referring to? Of course pedo stuff.
Despicable.