Jennifer Jo Cobb looks out of the garage area before practice for the NASCAR Truck series North Carolina Education Lottery 200 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 16, 2013. (Associated Press)
Jimmie Johnson celebrates with his crew in victory lane after winning the NASCAR All-Star auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 18, 2013. (AP Photo/Nell Redmond)
Kyle Larson (30) takes the checker flag to win the North Carolina Education Lottery 200 race in the NASCAR Camping World Truck Series in Rockingham, N.C., Sunday, April 14, 2013. (AP Photo/Jim R. Bounds)
Jimmie Johnson, left, talks with his crew chief, Chad Knaus, outside his garage after practice for the NASCAR Sprint Unlimited Shootout auto race at Daytona International Speedway, Friday, Feb. 15, 2013, in Daytona Beach, Fla. (AP Photo/John Raoux)
Trevor Bayne (21) spins in Turn 1 as Brad Keselowski (2) hits the apron and Carl Edwards (99), Scott Speed (95), Josh Wise (35) and Austin Dillon (33) try to avoid them during the NASCAR Daytona 500 Sprint Cup Series auto race at Daytona International Speedway in Daytona Beach, Fla., on Sunday, Feb. 24, 2013. (AP Photo/Phelan M. Ebenhack)
Driver Kevin Harvick celebrates in victory lane after winning the first of two 150-mile qualifying races for the NASCAR Daytona 500 auto race at Daytona International Speedway, Thursday, Feb. 21, 2013, in Daytona Beach, Fla. (AP Photo/Terry Renna)
Danica Patrick checks out her car while crew members make adjustments in her garage during a practice session for the NASCAR Daytona 500 Sprint Cup Series auto race at Daytona International Speedway, Saturday, Feb. 16, 2013, in Daytona Beach, Fla. (AP Photo/Phelan M. Ebenhack)
Republican National Committee Chairman Reince Priebus and Rep. Jason Chaffetz, R-Utah, hold a press conference at the NASCAR Hall of Fame where the Republicans will respond to Democrat press conferences and other events at the Democratic National Convention in Charlotte, N.C., on Monday, September 3, 2012. (Barbara Salisbury/ The Washington Times)
A spectator takes a photograph of the Romney campaign race car after Republican National Committee Chairman Reince Priebus and Rep. Jason Chaffetz, R-Utah, hold a press conference at the NASCAR Hall of Fame where the Republicans will respond to Democrat press conferences and other events at the Democratic National Convention in Charlotte, N.C., on Monday, September 3, 2012. (Barbara Salisbury/ The Washington Times)
Republican National Committee Chairman Reince Priebus and Rep. Jason Chaffetz, R-Utah, hold a press conference at the NASCAR Hall of Fame where the Republicans will respond to Democrat press conferences and other events at the Democratic National Convention in Charlotte, N.C., on Monday, September 3, 2012. (Barbara Salisbury/ The Washington Times)
Republican presidential candidate Mitt Romney, left, and his vice presidential running mate Rep. Paul Ryan, R-Wis., arrive at a campaign rally Sunday, August 12, 2012 in Mooresville, N.C. at the NASCAR Technical Institute. (AP Photo/Jason E. Miczek)