Please review the difference between carelessness and theft.

While it's too early to tell, Biden seems to have been negligent but not intentionally dishonest. Biden's situation seems similar to the February 2005 case of Attorney General Alberto Gonzales, although unlike Biden there was evidence of Gonzales's specific knowledge and personal handling of highly classified material outside of an appropriate classified facility. Plus, unlike Biden, Gonzales did not self-report his mishandling of the classified material. But we'll see when the evidence is presented.

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Basically your opinion to give Biden a pass.

snip
'Lawyers received instructions to secure Trump's document room months before the FBI search at Mar-a-Lago: report'

'Former President Trump met with investigators months before the FBI search on Monday, sources told CNN.
Investigators asked where Trump stored his documents and attorneys showed them a basement room.
After the meeting, Trump's attorneys received a letter asking to secure the room, sources told CNN.'

businessinsider.com - Trump asked lawyers add padlock office before FBI search

Investigators knew the Trump documents were stored in a secured locked location.

Biden's classified documents were haphazardly laying around in unsecured areas.

Trump's crime? He did not return the documents in the time frame allotted.

Biden's crime: Yet to be determined following a through search of the found documents.

The amount of documents each had is irreverent.