Just another reasonable concern, on Joe Biden's part. Joe Biden has good reason to be concerned that Trump would try to "steal" the election in November. Trump certainly won't be gracious about losing what he surely must feel is his entitlement... his "due". He's an authoritarian. He won't take "no" for an answer. There've only been 3 other presidents who were ousted after one term in office. We don't do this very often.