Doesn't look like they can, but that doesn't mean they wouldn't fish for some cockamamy scheme to try to make it happen. https://www.wusa9.com/article/news/verify/obama-cant-be-vice-president-for-biden-verify/65-9e4eb588-7725-42e0-b852-69da87a69c63 https://www.thecoldwire.com/can-a-former-president-be-vice-president/