U.S. Republican presidential nominee Donald Trump speaks at a campaign event at Trump Doral golf course in Miami, Florida, U.S. July 27, 2016. REUTERS/Carlo Allegri

Britain Golf - BMW PGA Championship - Wentworth Club, Virginia Water, Surrey, England - 27/5/16 Europe team captain Darren Clarke talks at a press conference as he names his three vice captains for the 2016 Ryder Cup Action Images via Reuters / Andrew Boyers Livepic

Britain Golf - BMW PGA Championship - Wentworth Club, Virginia Water, Surrey, England - 27/5/16 Europe team captain Darren Clarke with Padraig Harrington and Thomas Bjorn after naming them as vice captains for the 2016 Ryder Cup during a press conference Action Images via Reuters / Andrew Boyers Livepic

Sam Torrance of Scotland reacts as he missed a putt at 18th hole of the European Seniors Tour Casa Serena Open golf tournament in the village of Roztez, near the central Czech town Kutna Hora, 70 km (43 miles) east of Prague, September 18, 2011. REUTERS/Petr Josek

U.S. Republican presidential nominee Donald Trump arrives at a campaign event at Trump Doral golf course in Miami, Florida, U.S. July 27, 2016. REUTERS/Carlo Allegri

U.S. Republican presidential nominee Donald Trump speaks at a campaign event at Trump Doral golf course in Miami, Florida, U.S. July 27, 2016. REUTERS/Carlo Allegri

U.S. Republican presidential nominee Donald Trump speaks at a campaign event at Trump Doral golf course in Miami, Florida, U.S. July 27, 2016. REUTERS/Carlo Allegri

U.S. Republican presidential nominee Donald Trump speaks at a campaign event at Trump Doral golf course in Miami, Florida, U.S. July 27, 2016. REUTERS/Carlo Allegri