Just wondering out loud. Does a president have to pass a security clearance. If so, then have white-hats at FBI do one on Joe Biden. You know, give him a call and say: we want to set up a meeting with to go over some things we found in your background check. Don't worry, it's routine and if you want, you can have a lawyer with you.
Or better yet, have them call his announced Chief of Staff and get him to set up the meeting with Joe. Thinking that would shake things up.