Now Playing: Elizabeth Warren: No Confirmation Needed

Now Playing: Outgoing UN Ambassador Haley pokes fun at Trump

Now Playing: Trump praises candidate who body-slammed reporter

Now Playing: This day in history: Oct. 22, 1983

Now Playing: This day in history: Oct. 23, 1973

Now Playing: Trump comments perceived by some as encouraging violence

Now Playing: The Briefing Room: Migrant caravan reaches Guatemala-Mexico border

Now Playing: Caravan of migrants tears down fence on Mexico-Guatemala border

Now Playing: Treasury official arrested, charged with leaking data from Russia probe

Now Playing: Saudis should get 'a few more days' to investigate journalist's disappearance: Pompeo

Now Playing: President Trump on historic media blitz

Now Playing: Pompeo says Trump should give Saudis 'a few more days' after return from trip

Now Playing: Trump on whether Jamal Khashoggi is dead: 'certainly looks that way'

Now Playing: Sports legends endorse Sen. Manchin in new ad

Now Playing: Need more time: Sec. Pompeo says Saudis need a few more days

Now Playing: President Trump goes on a media blitz

Now Playing: Native American calls North Dakota voter ID law 'unconstitutional'

Now Playing: Democratic Senate candidate would meet with Trump

Now Playing: Plane carrying Melania Trump turns around after 'burning' smell reported on board

Now Playing: Midterm Elections 2018: What you need to know