Now Playing: Nancy Pelosi on dinner with Trump and Schumer

Now Playing: The Note: Bush, Obama and Gen. Kelly try to elevate the dialogue in the era of Trump

Now Playing: Nancy Pelosi on Puerto Rico relief, Trump's call to fallen soldier's widow

Now Playing: Rep. Frederica Wilson says she's a 'rock star' after feuding with the White House

Now Playing: White House press secretary says it's 'highly inappropriate' to debate 4-star general

Now Playing: WH defends chief of staff: It's 'inappropriate' to debate a 'four-star general'

Now Playing: The Note: Will Obama stay above the fray amid Trump's patriotism challenge?

Now Playing: Bush appears to blast Trump without naming him

Now Playing: Senators unveil bill to regulate online political ads

Now Playing: John Kelly 'stunned' at lawmaker's criticism of Trump's call to widow

Now Playing: Trump gives Puerto Rico response a '10,' calls storm 'worse than Katrina'

Now Playing: John Kelly speaks at White House press briefing

Now Playing: Obama steers clear of Trump in 1st campaign stop since leaving White House

Now Playing: Trump denies telling widow of fallen soldier, 'He knew what he signed up for'

Now Playing: Attorney general says he has not been interviewed by special counsel team

Now Playing: Attorney general grilled over cutting federal money to Chicago

Now Playing: Analysis of Trump's meeting with Senate Finance Committee on tax overhaul

Now Playing: 'Give me a break!': Attorney general after grilling from senator

Now Playing: We're not prepared for future election interference: Attorney general

Now Playing: Trump feuds with John McCain