Arizona Senate candidates Joe Arpaio, Kelli Ward on why they’re running Video

  • Now Playing: ‘Start Here’ podcast: Controversial Facebook post complicates Arizona Senate primary


  • Now Playing: Junior Arizona senator: McCain ‘put service… over and above self interest’




  • Now Playing: Flags fly at half staff at US Capitol, tributes pour in for Sen. John McCain




  • Now Playing: Arizona Senate candidates Joe Arpaio, Kelli Ward on why they’re running




  • Now Playing: What Aaron Hernandez’ fiancee, lawyer think of his final notes before his suicide




  • Now Playing: Back home in Staten Island with ‘The Way I Are’ singer Bebe Rexha




  • Now Playing: Coach, kids rescued from Thai cave on the moment they were found: Part 1




  • Now Playing: After rescue from Thai cave, Coach, boys share message to the world: Part 2




  • Now Playing: South Africans grapple with land expropriation




  • Now Playing: Inside Afghanistan: On the ground with US troops




  • Now Playing: ‘It’s just like a feeling’: Ariana Grande on how she knew Pete Davidson was the one




  • Now Playing: Cohen pleads guilty, Manafort found guilty on 8 counts




  • Now Playing: Body found in search for missing Iowa jogger Mollie Tibbetts




  • Now Playing: Friend of woman allegedly killed by husband on why something ‘didn’t seem right’




  • Now Playing: How ‘BlacKkKlansman’ director, cast tackled story of black cop infiltrating the KKK




  • Now Playing: ‘Crazy Rich Asians’ stars, author on making the film, Asian-American representation




  • Now Playing: Aretha Franklin: Defining what it meant to be a diva: Part 2




  • Now Playing: Celebrities, fans remember Aretha Franklin, who died at age 76: Part 1




  • Now Playing: Parkland students return to school six months after deadly shooting




  • Now Playing: Meet the youngest athlete to ever qualify for the World Surf League Championship Tour