A protester holds up a sign during a rally against US Republican presidential candidate Donald Trump in Burlingame, California on April 29, 2016.
Trump is delivering the keynote address at the California Republican Party's CAGOP 2016 Convention in Burlingame. / AFP / Josh Edelson (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
Michael Garcia holds up a sign during a protest against US Republican presidential candidate Donald Trump in Burlingame, California, on April 29, 2016.
Trump is delivering the keynote address at the California Republican Party's CAGOP 2016 Convention in Burlingame. / AFP / Josh Edelson (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
Protestors block traffic outside of the California Republican Party Convention where Republican presidential candidate Donald Trump is scheduled to speak on April 29, 2016 in Burlingame, California. (Ramin Talaie/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
BURLINGAME, CA - APRIL 29: Protestors block traffic outside of the California Republican Party Convention where Republican presidential candidate Donald Trump is scheduled to speak on April 29, 2016 in Burlingame, California. Previously hundreds of protesters opposing Donald Trump gathered outside the Orange County Fair & Event Center where approximately twenty people were arrested. (Photo by Ramin Talaie/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
Protesters hold up signs during a rally against US Republican presidential candidate Donald Trump in Burlingame, California on April 29, 2016. T
Trump is delivering the keynote address at the California Republican Party's CAGOP 2016 Convention in Burlingame. / AFP / Josh Edelson (Photo credit should read JOSH EDELSON/AFP/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
BURLINGAME, CA - APRIL 29: Protestors block traffic outside of the California Republican Party Convention where Republican presidential candidate Donald Trump is scheduled to speak on April 29, 2016 in Burlingame, California. Previously hundreds of protesters opposing Donald Trump gathered outside the Orange County Fair & Event Center where approximately twenty people were arrested. (Photo by Ramin Talaie/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
BURLINGAME, CA - APRIL 29: Protestors block traffic outside of the California Republican Party Convention where Republican presidential candidate Donald Trump is scheduled to speak on April 29, 2016 in Burlingame, California. Previously hundreds of protesters opposing Donald Trump gathered outside the Orange County Fair & Event Center where approximately twenty people were arrested. (Photo by Ramin Talaie/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
BURLINGAME, CA - APRIL 29: Protestors block traffic outside of the California Republican Party Convention where Republican presidential candidate Donald Trump is scheduled to speak on April 29, 2016 in Burlingame, California. Previously hundreds of protesters opposing Donald Trump gathered outside the Orange County Fair & Event Center where approximately twenty people were arrested. (Photo by Ramin Talaie/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
BURLINGAME, CA - APRIL 29: Republican presidential candidate Donald Trump supporter Cheryl Ann McDonald stands for a photo during the California Republican Party Convention on April 29, 2016 in Burlingame, California. Trump is preparing for the California Primary on June 7. (Photo by Ramin Talaie/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
BURLINGAME, CA - APRIL 29: Republican presidential candidate Donald Trump supporters take photos during the California Republican Party Convention on April 29, 2016 in Burlingame, California. Trump is preparing for the California Primary on June 7. (Photo by Ramin Talaie/Getty Images)
Donald Trump Speaks At The California Republican Party Convention
BURLINGAME, CA - APRIL 29: Republican presidential candidate Donald Trump supporter Michael Curtis Malaney (R) is interviewed by Scott Shafer of KQED during the California Republican Party Convention on April 29, 2016 in Burlingame, California. Trump is preparing for the California Primary on June 7. (Photo by Ramin Talaie/Getty Images)