Now Playing: Obama: Health Reform Is Rx for Deficit

Now Playing: Republicans United in March to Caucus

Now Playing: GOP Doc to Pelosi: 'Are You So Arrogant ...'

Now Playing: Giving Trump a list of prisoners' names doesn't address problems, NFL players say

Now Playing: US mayors rally at border town against Trump's family separation policy

Now Playing: First lady makes unannounced visit to Texas to see migrant children

Now Playing: Proposed government overhaul would combine food safety efforts

Now Playing: DHS Secretary addresses controversial immigration policy

Now Playing: White House discussion of government reorg involves pizza, roast beef

Now Playing: SPECIAL REPORT: Trump says he will act to keep families together

Now Playing: Global outcry from US allies grows against Trump border policy

Now Playing: House GOP voting Thursday to end family separation

Now Playing: Trump says he will sign 'something' soon to keep immigrant families together

Now Playing: Former Trump aide mocks migrant with Down syndrome

Now Playing: Trump to sign executive order on family separation

Now Playing: Trump signs executive order ending family separation policy at US-Mexico border

Now Playing: Trump signs executive order to end policy of separating children from parents

Now Playing: Trump holds campaign rally in Minnesota

Now Playing: Congressman blasts immigration policy, makes emotional plea to GOP

Now Playing: Rev. Al Sharpton decries separation of immigrant families