President Trump tweeted that he was confident that Pompeo would do a "fantastic job" in his new post.
Trump nominated intelligence officer Gina Haspel to replace Pompeo at the CIA. Trump appointed Haspel, a counterterrorism specialist, as the CIA's deputy director in February 2017. She will be the first female director in the agency's history.
Speaking to reporters outside the White House on Tuesday, the president emphasized that he had made the decision to sack Tillerson himself, adding that he felt "Mr. Tillerson will be much happier now."
A White House official has indicated that the cabinet shuffle was connected to Trump's desire to shake up his team ahead of upcoming talks with North Korea. Earlier this year, Pompeo warned that Pyongyang was just months away from having the capability of launching a missile at targets anywhere in the US. Last year, the CIA director hinted that he favored regime change in the country.
Trump also confirmed Tuesday that while he and Secretary Tillerson "got along…quite well," they disagreed on a number of issues, including the Iran nuclear deal.
Pompeo's Record
Trump chose Pompeo as his CIA director in January 2017. Prior to that, the official served as a lawmaker in the House of Representatives' select committee on intelligence, and the subcommittee on the CIA. Pompeo's other duties in Congress had mostly been limited to domestic affairs, including energy and the subcommittee on digital commerce and consumer protection.
Before Tuesday's announcement, rumors circulated for several months that Secretary Tillerson was considering resigning from the post.
Regarded as a hawk on Iran, Pompeo has called on the US to withdraw from the 2015 nuclear deal, and has repeatedly warned of Tehran's growing influence in Iraq and throughout the Middle East.
Pompeo has also condemned the activities of whistleblowing group WikiLeaks, and characterized the organization as a threat to US national security.
Russia Ready to Work With New Sec of State
Asked to comment on Pompeo's appointment, Yevgeny Serebrennikov, first deputy chairman of the Russian Senate's committee on defense and security, said that Moscow was ready to cooperate with the new secretary of state, but has no illusions about the prospects of improving Moscow-Washington ties.
"Russia will cooperate with all those appointed to this or that post in the Trump administration. We are pursuing a course of reducing tensions in relations between our countries, but our partners apparently do not share this aspiration," Serebrennikov said.
Social Media Reacts
Public reaction to Tillerson's ouster and Pompeo's appointment has been largely polarized between Trump supporters and opponents, with some people considering the broader implications for the Trump administration.