Republican U.S. presidential candidate Donald Trump speaks at a campaign event on the day several states held presidential primaries, including California, at the Trump National Golf Club Westchester in Briarcliff Manor, New York, U.S., June 7, 2016 REUTERS/Carlo Allegri

Republican U.S. presidential candidate Donald Trump speaks at a campaign event on the day several states held presidential primaries, including California, at the Trump National Golf Club Westchester in Briarcliff Manor, New York, U.S., June 7, 2016 REUTERS/Carlo Allegri

Republican U.S. presidential candidate Donald Trump speaks at a campaign event on the day several states held presidential primaries, including California, at the Trump National Golf Club Westchester in Briarcliff Manor, New York, U.S., June 7, 2016 REUTERS/Carlo Allegri

June 9, 2016 9:05 AM (UTC+8)