I'd offer him a pulled pork sandwich to see if he would eat it. I've been wondering if pork has been served in the White House since he has been in office!
Keep in mind that the Secret Service would probably require you to empty your safes before allowing anybody under its protection to come to your home.
I would tell them so sorry, I am not locking up all my guns.This was my first thought. They can't legally require you to remove you guns in your house for something you didn't have any choice in. So surely they would give you notice of either comply with security requirements, or refuse the visit.
I'm not sure how I'd handle that.