White House officials say the biggest factor in Secretary of State Rex Tillerson's ouster was his views on North Korea. Tillerson's policy of dialogue over a more hardline approach had conflicted with President Donald Trump's strategy. CIA director Mike Pompeo appears to be on the same wavelength as Trump on the subject. Pompeo is Trump's proposed replacement for Tillerson. Other intelligence officials agreed that Pompeo's views on North Korea aligned with Trump's.