Daniel B. Baer is the senior vice president for policy research at the Carnegie Endowment for International Peace, a former U.S. ambassador to the Organization for Security and Cooperation in Europe from 2013 to 2017, and the author of The Four Tests: What it Will Take to Keep America Strong and Good.
Chinese then-Vice President Xi Jinping and U.S. then-Vice President Joe Biden at a welcome ceremony inside the Great Hall of the People on Aug. 18, 2011 in Beijing.
Photographers outside the U.S. Justice Department in Washington on March 22, after special counsel Robert Mueller delivered his report to Attorney General William Barr. (Tasos Katopodis/Getty Images)
Mike Pompeo, President Donald Trump's pick for Secretary of State, speaks during his confirmation hearing before the Senate Foreign Relations Committee on April 12. (Mark Wilson/Getty Images)
Russian President Vladimir Putin waves after delivering a speech at a forum of volunteers in Moscow on December 6, 2017. (KIRILL KUDRYAVTSEV/AFP/Getty Images)