Now Playing: Possible Trump VP Pick Supports Abortion Rights: 'Women Have to Be Able to Choose'

Now Playing: This Week Fast Forward 07.10.16

Now Playing: Trump praises Michael Cohen on Twitter

Now Playing: Missouri governor accused of a second felony

Now Playing: Fallout from new DNC lawsuit

Now Playing: Democratic Party launches legal attack against Trump's inner circle

Now Playing: Comey memos: 15 pages of meticulous detail, written in real time

Now Playing: Anthony Scaramucci on Comey's memos, Trump and whether Michael Cohen will flip

Now Playing: US Senator casts vote holding newborn

Now Playing: Duckworth casts vote holding newborn on Senate floor after rule change

Now Playing: Comey memos released to Congress

Now Playing: Trump adds former NY Mayor Rudy Giuliani to his legal team

Now Playing: GOP lawmakers call for investigation of Comey, Clinton and more

Now Playing: 'The View' talks Nikki Haley's 'I don't get confused' comment

Now Playing: Dana Perino on Nikki Haley, bipartisanship and more

Now Playing: Mention of Trump, Mueller and riot gear in Pittsburgh police email causes stir

Now Playing: US ambassador to the UN describes her relationship to Trump as 'perfect'

Now Playing: Trump says Mueller, Rosenstein 'still here' despite reports they'll be fired

Now Playing: Trump says he's willing to walk away from N. Korea talks

Now Playing: 'Powerhouse Politics': House Republicans on who should get the speaker's gavel