Sen. Rand Paul, R-Ky. holds up his cell phone as he speaks before announcing the start of his presidential campaign, in Louisville, Ky., April 7, 2015. (Associated Press) ** FILE **
Sen. Rand Paul, R-Ky. holds up his cell phone as he speaks before announcing the start of his presidential campaign, in Louisville, Ky., April 7, 2015. (Associated Press) ** FILE **
Victor Espinoza rides American Pharoah to victory in the 141st running of the Kentucky Derby horse race at Churchill Downs Saturday, May 2, 2015, in Louisville, Ky. (AP Photo/Tim Donnelly)
This Sept. 5, 2014, photo shows Sidebar at Whiskey Row, a bar that offers more than 100 bourbons, in the heart of downtown Louisville, Ky. Restaurants along the city's Urban Bourbon Trail are routinely stocked with 50 to 150 varieties of Kentucky's signature spirit. (Associated Press) **FILE**
Sen. Rand Paul, R-Ky., announces the start of his presidential campaign, Tuesday, April 7, 2015, at the Galt House Hotel in Louisville, Ky. (AP Photo/Carolyn Kaster)
Sen. Rand Paul, R-Ky., joined by his wife, Kelley Ashby, arrives to announce the start of his presidential campaign, Tuesday, April 7, 2015, at the Galt House Hotel in Louisville, Ky. (AP Photo/Carolyn Kaster) ** FILE **
Sen. Rand Paul's wife, Kelly, will be with him at the Louisville opener and may join him at other stops on the five-day, five-state launch. (Associated Press)
Dayton forward Ally Malott laughs during a news conference for a women's college basketball regional semifinal game in the NCAA Tournament on Friday, March 27, 2015, in Albany, N.Y. Dayton plays Louisville on Saturday. (AP Photo/Mike Groll)
Kentucky forward Willie Cauley-Stein dunks in front of Cincinnati forward Octavius Ellis and guard Troy Caupain, right, during the first half of an NCAA tournament third round college basketball game in Louisville, Ky., Saturday, March 21, 2015. (AP Photo/David Stephenson)
UAB forward William Lee smiles after scoring against Iowa State during the first half of an NCAA tournament second round college basketball game in Louisville, Ky., Thursday, March 19, 2015. (AP Photo/David Stephenson)
Louisville's Terry Rozier, right, attempts a shot against Virginia's Malcolm Brogdon during the second half of an NCAA college basketball game Saturday, March 7, 2015, in Louisville, Ky. Louisville won 59-57. (AP Photo/Timothy D. Easley)
United States Ryder Cup golfer Phil Mickelson and his wife Amy arrive at the 37th Ryder Cup Gala in Louisville, Ky., Wednesday, Sept. 17, 2008. (AP Photo/Rob Carr)']