Brandon should have regrets. He ILLEGALLY took those documents, only POTUS can legally take them.
And as a Senator, they have to go into a special room known as the SCIF (pronounced skiff). When they leave, they are searched and given back their cell phones. It's a regular production. For Biden to have classified docs from 15 years ago is a big deal...a felony and grounds for impeachment. should have regrets, yes!