Supporters greet U.S. Democratic presidential candidate Hillary Clinton as she arrives to speak at the University of California Riverside in Riverside, California, U.S. May 24, 2016. (Photo by Lucy Nicholson/Reuters)





A supporter of U.S. Democratic presidential candidate Hillary Clinton is seen after Clinton spoke at the University of California Riverside in Riverside, California, U.S. May 24, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton poses with a supporter after speaking at the University of California Riverside in Riverside, California, U.S. May 24, 2016. (Photo by Lucy Nicholson/Reuters)





A supporter cheers for U.S. Democratic presidential candidate Hillary Clinton as she speaks at the University of California Riverside in Riverside, California, U.S. May 24, 2016. (Photo by Lucy Nicholson/Reuters)





Supporters cheer for U.S. Democratic presidential candidate Hillary Clinton speaks at the University of California Riverside in Riverside, California, U.S. May 24, 2016. (Photo by Lucy Nicholson/Reuters)





A supporter listens to U.S. Democratic presidential candidate Hillary Clinton speak at the University of California Riverside in Riverside, California, U.S. May 24, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton takes a selfie with supporters after speaking at the University of California Riverside in Riverside, California, U.S. May 24, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton (C) shakes hands as she arrives with actress Jamie Lee Curtis (R) to speak at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





Supporters John Nelson, 32, (L) and Dan Stifler, 32, cheer U.S. Democratic presidential candidate Hillary Clinton as she arrives to speak on stage at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton (L) and actress Jamie Lee Curtis react as two supporters take their tops off at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





Supporters John Nelson, 32, (L) and Dan Stifler, 32, cheer for U.S. Democratic presidential candidate Hillary Clinton as she speaks at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton (R) and actress Jamie Lee Curtis react to the crowd after two male supporters took their tops off at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton takes a photo with supporters John Nelson, 32, (L) and Dan Stifler, 32, (C) after speaking at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





Supporters John Nelson, 32, (L) and Dan Stifler, 32, hug actress Jamie Lee Curtis after she and U.S. Democratic presidential candidate Hillary Clinton spoke at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton speaks at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





U.S. Democratic presidential candidate Hillary Clinton (R) and actress Jamie Lee Curtis react to the crowd after two male supporters took their tops off at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





Supporters listen to U.S. Democratic presidential candidate Hillary Clinton speak at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)





A supporter waits for U.S. Democratic presidential candidate Hillary Clinton to speak at the UFCW Union Local 324 in Buena Park, California, U.S. May 25, 2016. (Photo by Lucy Nicholson/Reuters)