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.
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)
Sen. Bob Corker (left) and Sen. Ben Cardin prepare to listen to testimony at a Senate Foreign Relations Committee hearing on the U.S.-Russia relationship, on Feb. 9, 2017. (Mario Tama/Getty Images)
Secretary of State Condoleezza Rice (L) and Secretary of Defense Robert Gates (R) walk down the West Wing Colonnade prior to a statement by US President George W. Bush on the situation between Georgia and Russia in the Rose Garden of the White House in Washington, DC, on August 13, 2008. Russia must respect Georgia's territorial sovereignty, US President George W. Bush said Wednesday. AFP PHOTO/SAUL LOEB (Photo credit should read SAUL LOEB/AFP/Getty Images)
Pope Francis arrives for his weekly general audience at St Peter's square on October 14, 2015 at the Vatican. Pope Francis apologised Wednesday on behalf of the Catholic Church for a series of scandals which have recently shaken the city of Rome and the Vatican. The Vatican has been the focus of several controversies including the coming out of a gay priest and the leak of a controversial letter, while the pontiff himself ended up in the headlines for a gaffe which helped oust Rome's mayor. AFP PHOTO / VINCENZO PINTO (Photo credit should read VINCENZO PINTO/AFP/Getty Images)
WASHINGTON, DC - JUNE 01: U.S. President Donald Trump announces his decision to pull the United States out of the Paris climate agreement in the Rose Garden at the White House June 1, 2017 in Washington, DC. Trump pledged on the campaign trail to withdraw from the accord, which former President Barack Obama and the leaders of 194 other countries signed in 2015. The agreement is intended to encourage the reduction of greenhouse gas emissions in an effort to limit global warming to a manageable level. (Photo by Chip Somodevilla/Getty Images)
A demonstrator holds a banner reading "One climate one world" during a rally held by several Non Governmental Organisations (NGO) to form a human chain on the Champs de Mars near the Eiffel Tower in Paris on December 12, 2015 on the sidelines of the COP21, the UN conference on global warming.
French hosts submit the final version of a global climate-saving pact to negotiators at UN Conference on december 12. The goal is for ministers to approve the agreement by the end of the day but that could be extended one more day. / AFP / FRANCOIS GUILLOT (Photo credit should read FRANCOIS GUILLOT/AFP/Getty Images)
US Secretary of State Hillary Clinton (R) shakes hands with Russian Prime Minister Vladimir Putin (L) outside Moscow in Novo-Ogarevo on March 19, 2010. Russian Prime Minister Vladimir Putin met US Secretary of State Hillary Clinton and used the occasion to bemoan Moscow's stalled WTO application and the state of bilateral trade. Russia, the world's largest economy outside the global trade body, has repeatedly accused Washington of hindering its efforts to join the World Trade Organization in talks that have dragged on since 1993. AFP PHOTO / RIA NOVOSTI / POOL / ALEXEY NIKOLSKY (Photo credit should read ALEXEY NIKOLSKY/AFP/Getty Images)
LOS ANGELES, CA - SEPTEMBER 15: Republican presidential candidate Donald Trump speaks during a campaign rally aboard the USS Iowa on September 15, 2015 in Los Angeles, California. Donald Trump is campaigning in Los Angeles a day ahead of the CNN GOP debate that will be broadcast from the Ronald Reagan Presidential Library in Simi Valley. (Photo by Justin Sullivan/Getty Images)
TOPSHOT - US President-elect Donald Trump boards the elevator after escorting Martin Luther King III to the lobby after meetings at Trump Tower in New York City on January 16, 2017. / AFP / DOMINICK REUTER (Photo credit should read DOMINICK REUTER/AFP/Getty Images)
