The audience in Winston-Salem, North Carolina, could be forgiven for forgetting which Democrat is running for president. It was Michelle Obama who had the last word at a rally on Thursday afternoon after being introduced by Hillary Clinton. The First Lady took more time to speak than Clinton did, and it was the first lady who received longer and more effusive praise from her partner on stage. “Hillary’s mini tribute to me has taken me off — kind of, thrown me a little,” Obama told the crowd after Clinton’s introductory remarks. As Clinton has entered the last stretch of the election, her campaign has liberally deployed Obama as its most popular political surrogate.