Trump replaces campaign manager as polls show him trailing Biden in presidential race - The Washington Post

Bill Stepien was the field director for the 2016 campaign and has worked for the president since the election. https://www.washingtonpost.com/politics/trump-parscale-stepien-campaign-manager/2020/07/15/91aad9b6-c6fd-11ea-8ffe-372be8d82298_story.html