Democratic vice presidential candidate, Sen. Tim Kaine, D-Va. speaks during a campaign stop, Thursday, Sept. 1, 2016, in Dover, N.H. (AP Photo/Charles Krupa)
Jimmie Johnson puts his helmet on to re-enter his car during final practice for the NASCAR Sprint Cup series auto race, Saturday, May 14, 2016, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)
In this June 19, 2015 file photo, Paul McCartney performs on Day 2 of the 2015 Firefly Music Festival at The Woodlands in Dover, Del. (Photo by Owen Sweeney/Invision/AP)
Democratic presidential candidate Hillary Rodham Clinton listens to a question from a guest after a town hall meeting in Dover, N.H., Thursday, July 16, 2015. (AP Photo/Charles Krupa)
Democratic presidential candidate Hillary Rodham Clinton addresses a gathering during a town hall meeting in Dover, NH., Thursday, July 16, 2015. (AP Photo/Charles Krupa)
Jimmie Johnson sprays sparking wine as he celebrates in Victory Lane after he won the NASCAR Sprint Cup series auto race, Sunday, May 31, 2015, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)
DANICA PATRICK - AUTO RACING
Danica Patrick gets ready before qualifying for the NASCAR Sprint Cup series auto race, Friday, Sept. 26, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)
Tony Stewart, left, talks on pit road before qualifying for the NASCAR Sprint Cup series auto race, Friday, Sept. 26, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)
Tony Stewart, left, talks on pit road before qualifying for the NASCAR Sprint Cup series auto race, Friday, Sept. 26, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)
Jeff Gordon drives during practice for the NASCAR Sprint Cup series auto race, Saturday, Sept. 27, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)
In this June 21, 2013, file photo, Chuck D of the rap group Public Enemy performs on Day 1 of the Firefly Music Festival at The Woodlands, in Dover, Del. (Photo by Owen Sweeney/Invision/AP, file)
Jimmie Johnson celebrates winning the NASCAR Sprint Cup series auto race, Sunday, June 1, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson does a burn-out after winning the NASCAR Sprint Cup series auto race at Dover International Speedway, Sunday, June 1, 2014, in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson celebrates winning the NASCAR Sprint Cup series auto race with his wife Chandra, left, and daughters Lydia and Genevieve, right, at Dover International Speedway, Sunday, June 1, 2014, in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson, left, holds his daughter Genevieve with his wife Chandra, right, before driving in the NASCAR Sprint Cup series auto race at Dover International Speedway, Sunday, June 1, 2014, in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson drives during the NASCAR Sprint Cup series auto race, Sunday, June 1, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson, left, celebrates winning the NASCAR Sprint Cup series auto race at Dover International Speedway, Sunday, June 1, 2014, in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson drives during the NASCAR Sprint Cup series auto race, Sunday, June 1, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson holds his daughter Genevieve, left, before driving in the NASCAR Sprint Cup series auto race at Dover International Speedway, Sunday, June 1, 2014, in Dover, Del. (AP Photo/Molly Riley)