LAS VEGAS, NV - OCTOBER 13:  Democratic presidential candidate Hillary Clinton takes part in a presidential debate sponsored by CNN and Facebook at Wynn Las Vegas on October 13, 2015 in Las Vegas, Nevada. Five Democratic presidential candidates are participating in the party's first presidential debate.  (Photo by Joe Raedle/Getty Images)
Joe Raedle/Getty Images North America/Getty Images
LAS VEGAS, NV - OCTOBER 13: Democratic presidential candidate Hillary Clinton takes part i