Many children have imaginary friends. But few of those BFFs are called Joe Biden.... ....Earlier this year, Avery's grandmother, Becky Burke, posted a message on Biden's website, informing him of his littlest fan and their regular 'chats', according to KCCI News 8.... Then, last Wednesday night, she answered the phone - and Biden was on the other end. 'He said, "This is Joe Biden" and I said, "Who the hell is this?' said Ms Burke. 'And he said, "This is Joe Biden", and I said, ‘I’m so sorry, I’m so sorry I said that to you.”