Senator Biden removed Classified Documents from a SCIF . That isn't an unintentional accident. When you exit they have a person that has your phone and electronic devices that ask you if you are "clean" before they are returned to you. Biden obviously smuggled them out for a reason. Probably to copy and sell the information to China or Ukraine where his son made million selling access to Joe Biden.
"Senator Biden removed Classified Documents from a SCIF". <-- I doubt very much that's true. Most likely there were lying around in his office and someone else packed them, not knowing what they were. To be fair - probably the same with Pence. Either Pence lied or he was unaware, like Biden the docs were even in his posession.