WASHINGTON (AP) — Self-described “Middle Class Joe” Biden has left the ranks of the middle class in terms of his financial status. The Democratic presidential candidate reports in tax returns and disclosure forms that he and his wife have earned more than $15 million in the years since he was vice president in the Obama administration. Before lucrative book and speaking deals, Biden took in little more than his government salary as vice president and, before that, a U.S. senator from Delaware.