Ford Motor Co. replaced Toyota Motor Sales U.S.A., Inc. as the biggest spender in the auto category in 2016, according to ESP research.The primary reason: Ford’s multi-million-dollar sponsorship with the National Football League. The deal, as well as a few others, helped increase the automaker’s sponsorship spend an estimated $20 million from 2015 to 2016.Below, sponsorship spending, major deals and portfolio overviews at the five biggest spenders in the auto category.Ford Motor Corp...