Unlike President Biden who is under investigation for mishandling classified documents from his tenure as vice president, Mike Pence has been transparent in how he has dealt with returning classified material. Joe Biden is intent on hiding information from the American people while Pence looks to quickly remedy any potential error in his handling of materials from his vice presidency.
Despite emphatically declaring that he did not possess any classified materials, Mike Pence is now backtracking and handing in materials that he claimed not to possess. Pence sees the severe consequences of mishandling classified documents, but now there must be an investigation into the reason he possessed them in the first place. This appears to be a large issue dating to the Trump administration.