SAN FRANCISCO, CA - MARCH 28: Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders. (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28:  Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders.  (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28: Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders. (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28:  Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders.  (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28: Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders. (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28:  Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders.  (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28: Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders. (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28:  Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders.  (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28: Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders. (Photo by Justin Sullivan/Getty Images)

SAN FRANCISCO, CA - MARCH 28:  Former Secretary of State Hillary Clinton delivers a keynote address during the 28th Annual Professional Business Women of California conference on March 28, 2017 in San Francisco, California. Hillary Clinton delivered the keynote address at the day-long conference featuring speakers, seminars and panel discussions with industry leaders.  (Photo by Justin Sullivan/Getty Images)