Now Playing: Obama urges Georgians to ‘be unafraid’ of efforts to block voting rights
Now Playing: Trump admits Republicans could lose House
Now Playing: Heidi Heitkamp says she has ‘no regrets’ voting against Kavanaugh
Now Playing: Trump: America ‘now has the best economy’ in US history
Now Playing: Obama lays out midterm stakes, calls out Trump
Now Playing: President Trump says US troops ‘don’t have to fire’ at migrants throwing rocks
Now Playing: Trump tells reporter: ‘You’re creating violence by your question’
Now Playing: Who is Kyrsten Sinema?
Now Playing: Oprah Winfrey goes door-to-door in Georgia for Stacey Abrams
Now Playing: President Trump ramps up immigration rhetoric on campaign trail
Now Playing: Trump blames Obama for family separations at border
Now Playing: Trump suggests troops can shoot at migrants on the border
Now Playing: Oprah Winfrey knocks on doors in Georgia for Stacey Abrams
Now Playing: Trump ramps up fear rhetoric as midterm elections near
Now Playing: Will 2018 be the year of the young voter?
Now Playing: Trump says this election is about ‘common sense’
Now Playing: Georgia Democratic gubernatorial nominee gets help from Oprah
Now Playing: President’s campaign trail blitz
Now Playing: The Briefing Room: North Dakota tribe sues state to block voter ID law
Now Playing: President Trump announces new policy for asylum seekers
