Trump faces backlash over Congress’s border compromise Video

Now Playing: White House not ruling out another government shutdown

Now Playing: Government shutdown showdown continues

Now Playing: Trump faces backlash over Congress’s border compromise

Now Playing: BBC says Trump supporter attacked their cameraman at campaign rally

Now Playing: Former Trump lawyer: Mueller probe is ‘a terrible waste of time’

Now Playing: Trump ‘not happy’ about potential new border deal

Now Playing: ‘You knew you were with greatness’: Joe Biden’s eulogy for John Dingell

Now Playing: Rep. Aguilar speaks out on border deal reached despite Trump’s disapproval

Now Playing: Republicans urge Trump to sign border security deal

Now Playing: Embattled VA gov. to hold ‘listening tour’ across state to discuss race

Now Playing: Lawmakers reach ‘agreement in principle’ to avert government shutdown

Now Playing: Senator Kamala Harris plans to legalize marijuana

Now Playing: Blumenthal: Trump ‘out of his mind’ if he doesn’t approve bipartisan border deal

Now Playing: Lawmakers reach tentative ‘agreement’ to avoid possible government shutdown

Now Playing: Trump talks about dogs at Texas rally

Now Playing: Who is Mark Kelly?

Now Playing: Trump ‘not happy’ with congressional border deal

Now Playing: Inside the White House

Now Playing: Will President Donald Trump sign a bipartisan deal to avoid another shutdown?

Now Playing: New Democratic Congresswoman apologizes for ‘anti-Semitic comments’