U.S. President Donald Trump speaks alongside Vice President Mike Pence, and Secretary of State Mike Pompeo during a meeting with NATO Secretary General Jens Stoltenberg, at the White House on May 17. (Andrew Harrer-Pool/Getty Images)
U.S. President Donald Trump (right) delivers a speech with NATO Secretary-General Jens Stoltenberg at NATO headquarters in Brussels on May 25, 2017. (Mandel Ngan/AFP/Getty Images)
Protestors demonstrate against family separation outside the Otay Mesa Detention Center in San Diego, California, on June 23. (Robyn Beck/AFP/Getty Images)
U.S. President Donald Trump, British Prime Minister Theresa May, and other leaders gather during a NATO summit on May 25, 2017 in Brussels, Belgium. (Stefan Rousseau - Pool/Getty Images)
Sen. Bob Menendez (D-N.J.) speaks during a Senate Foreign Relations Committee on Capitol Hill in Washington, D.C. on Feb. 15, 2017 (Zach Gibson/AFP/Getty Images)
U.S. President Donald Trump speaks alongside Secretary of State Mike Pompeo following a meeting with a North Korean delegation at the White House on June 1. (Saul Loeb/AFP/Getty Images)
New U.S. Ambassador Richard Grenell stands in front of a military honor guard during an accreditation ceremony for new ambassadors in Berlin on May 8. (Odd Andersen/AFP/Getty Images)