Now Playing: Joe Barton Defends Oil Company Tax Credits

Now Playing: Is the Hearing on Radical Islam a Distraction?

Now Playing: Farm bill fails in the House 198-213

Now Playing: Trump names Robert Wilkie as new VA secretary nominee

Now Playing: Trump administration targets Planned Parenthood with new abortion rule

Now Playing: Trump responds to Texas school shooting

Now Playing: Jared Kushner hosts first forum on prison reform at White House

Now Playing: WH: School safety commission 'activated' in wake of Texas school shooting

Now Playing: Tillerson warns of 'crisis of ethics and integrity' in US

Now Playing: WH: Trump was referring to MS-13 as 'animals'

Now Playing: Trump offers protections for Kim Jong Un if he strikes a deal with US

Now Playing: Sanders doubles down on Trump's MS-13 remarks

Now Playing: Bernie Sanders top aide discusses 2020

Now Playing: Mueller investigation hits 1-year mark

Now Playing: Senate votes to confirm Gina Haspel as next CIA director

Now Playing: Trump reacts to North Korea statements: 'We'll see what happens'

Now Playing: Does Speaker Ryan hear 'Laurel' or 'Yanny'

Now Playing: EPA chief faces sharp criticism from Democratic lawmakers

Now Playing: Pelosi says Ethics has 'discretion' to break rules

Now Playing: Trump refers to some immigrants in sanctuary cities as 'animals'