Traffic clogs Highway 101 as people leave work in Los Angeles on Aug. 29, 2014. Mark Ralston/AFP via Getty Images hide caption

U.S. Army Sgt. 1st Class Michael James Goble, who was killed during combat operations in Kunduz province, Afghanistan, on Sunday. U.S. Army/Department of Defense hide caption

Senate Majority Leader Mitch McConnell, right, and Senate Minority Leader Chuck Schumer wait on stage together at the University of Louisville's McConnell Center before Schumer's scheduled speech last year. Bill Pugliano/Getty Images hide caption

President Trump meets French President Emmanuel Macron at Winfield House, on Tuesday, during the NATO summit in London. Evan Vucci/AP hide caption

Mark Sandy, from the Office of Management and Budget, arrives to the U.S. Capitol earlier this month for a deposition regarding whether President Trump ordered a hold on military assistance to Ukraine. Sarah Silbiger/Getty Images hide caption

A budget staffer is to become the first White House official to testify about Ukraine aid in the impeachment inquiry at the Capitol on Saturday. Joshua Roberts/Reuters hide caption

President Trump and Turkey's President Recep Tayyip Erdogan take part in a joint news conference during Erdogan's visit to the White House on Wednesday. Jim Watson/AFP via Getty Images hide caption

A Russian Tupolev Tu-154 Open Skies Treaty reconnaissance aircraft sits on the runway at Elmendorf Air Force Base in Anchorage, Alaska, in 2004. Mark Farmer/AP hide caption

A U.S. military vehicle drives past an oil pump jack in the countryside of Syria's northeastern city of Qamishli. President Trump is leaving some U.S. troops in Syria, with the goal of controlling Syria's oil fields. But legal experts say exploiting the oil could amount to pillaging — a war crime. Delil Souleiman/AFP/Getty Images hide caption