https://en.wikipedia.org/wiki/Kellogg_Arena
“Kellogg Arena is a 9,800-seat multi-purpose arena located in Battle Creek, Michigan. It was built in 1980. It seats 4,675 for basketball games, 4,859 for ice shows, 4,433 for the circus, 1,500 for theatrical shows and concerts, 6,200 for end-stage concerts and 6,500 for center-stage concerts.”
... and 100,000 for President Trump's appearance.