national security

FILE - In this Monday, June 24, 2019, file photo, Michael Flynn, President Donald Trump's former national security adviser, departs a federal courthouse after a hearing, in Washington. Trump said Sunday, March 15, 2020, that he is considering a full pardon for Flynn, who had pleaded guilty to lying to the FBI about dealings with Russia’s ambassador before Trump took office. (AP Photo/Patrick Semansky, File)

FILE - In this Feb. 18, 2020, file photo, Nigerian Navy Special Boat Service troops exercise under the supervision of British special forces during U.S. military-led annual counterterrorism exercise in Thies, Senegal. Both the Islamic State group and al-Qaida see the global upheaval caused by the new coronavirus as a threat but also as an opportunity to strike harder than before, asserting that the virus is punishment for non-Muslims while also urging followers to repent and take care of themselves. (AP Photo/Cheikh A.T. Sy, File)

U.S. Secretary of Defense Mark Esper, right, and Afghan President Ashraf Ghani, speaks during a joint news conference in presidential palace in Kabul, Afghanistan, Saturday, Feb. 29, 2020. The U.S. is poised to sign a peace agreement with Taliban militants on Saturday aimed at bringing an end to 18 years of bloodshed in Afghanistan and allowing U.S. troops to return home from America's longest war. (AP Photo/Rahmat Gul)

FILE - In this June 28, 2019, file photo, President Donald Trump, right, shakes hands with Russian President Vladimir Putin, left, during a bilateral meeting on the sidelines of the G-20 summit in Osaka, Japan. Intelligence officials say Russia is interfering with the 2020 election to try to help Trump get reelected, The New York Times reported Thursday, Feb. 20, 2020. (AP Photo/Susan Walsh, File)

FILE - In this June 27, 2018 file photo, White House Chief of Staff John Kelly, right, leans in to talk with President Donald Trump during Trump's meeting with Portuguese President Marcelo Rebelo de Sousa, in the Oval Office of the White House in Washington. Kelly is defending former White House national security aide, Army Lt. Col. Alexander Vindman, who raised concerns about President Donald Trump’s phone call with Ukraine’s president that spurred his impeachment. Kelly made the comments at a public forum Wednesday evening in Morristown, New Jersey. (AP Photo/Pablo Martinez Monsivais)

President Donald Trump listens to a question during a meeting with Ecuadorian President Lenin Moreno in the Oval Office of the White House, Wednesday, Feb. 12, 2020, in Washington. (AP Photo/Evan Vucci)

Attorney General William Barr waves as he walks on stage to speak at the National Sheriffs' Association Winter Legislative and Technology Conference in Washington, Monday, Feb. 10, 2020. (AP Photo/Susan Walsh)

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A pedestrian wears a protective mask in Alhambra, Calif., Friday, Jan. 31, 2020. As China grapples with the growing coronavirus outbreak, Chinese people in the Los Angeles area, home to the third-largest Chinese immigrant population in the United States, are encountering a cultural disconnect as they brace for a possible spread of the virus in their adopted homeland. (AP Photo/Damian Dovarganes)

In this image from video, Alan Dershowitz, an attorney for President Donald Trump, answers a question during the impeachment trial against Trump in the Senate at the U.S. Capitol in Washington, Wednesday, Jan. 29, 2020. (Senate Television via AP)