The State Department seal on the podium before a photo opportunity from Secretary of State Rex Tillerson, June 9 in Washington, D.C. (Drew Angerer/Getty Images)
U.S. Secretary of State Rex Tillerson attends a press conference at the Organization for Security and Cooperation in Europe in Vienna on Dec. 7.
(AFP/APA/Hans Punz/Austria OUT)
Sen. Ben Cardin (D-Md.), ranking member of the Senate Foreign Relations Committee, during a hearing on Capitol Hill on Oct. 28, 2015. (Allison Shelley/Getty Images)
WASHINGTON, DC - NOVEMBER 15: Senate Health, Education, Labor and Pensions Committee member Sen. Todd Young (R-IN) listens to testimony during a hearing in the Dirksen Senate Office Building on Capitol Hill November 15, 2017 in Washington, DC. U.S. Surgeon General Jerome Adams testified before the committee about community-level health promotion programs and businesses that offer incentives to employees that practice healthy lifestyles. (Photo by Chip Somodevilla/Getty Images)
Secretary of State Rex Tillerson leaves for meetings after posing for photos for the press at the State Department on Nov. 29 in Washington. (Saul Loeb/AFPGetty Images)
Secretary of State Rex Tillerson speaks at the Woodrow Wilson Center for International Scholars on Nov. 28, 2017 in Washington. (Brendan Smialowski/AFP/Getty Images)
Sen. Ben Cardin (D-Md.), ranking member of the Senate Foreign Relations Committee during a hearing on Capitol Hill, Oct. 28, 2015. (Allison Shelley/Getty Images)
Sen. Bob Corker (R-Tenn.) talks with U.S. Secretary of State Rex Tillerson before a Senate Foreign Relations Committee hearing, Oct. 30, 2017. (Drew Angerer/Getty Images)
U.S. Secretary of State Rex Tillerson and President Donald Trump attend a luncheon with African leaders in New York on Sept. 20. (Brendan Smialowski/AFP/Getty Images)