David Welna David Welna is NPR's national security correspondent.

Authorization For The Use Of Military Force Could Be Up For Update In Senate

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Defense Secretary James Mattis Keeps Low Profile Amid White House Controversy

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After Comey Hearing, What Comes Next In Senate Russia Probe?

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Qatar Accused Of Supporting Terrorists; Nations Sever Diplomatic Ties

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National Security Experts Divided In Response To White House Leaks

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Pentagon Reveals Results Of Probe Into Deadly Mosul Airstrike

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Lawmakers On Both Sides Alarmed By Reports Trump Disclosed Intelligence

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Acting FBI Director Contradicts White House Explanation For Comey's Dismissal

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As Tensions Rise, Experts Question Threat Level Posed By North Korea

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People walk through Moscow's Red Square in March. Both the House and Senate intelligence committees are investigating Russian interference in last year's presidential election. Spencer Platt/Getty Images hide caption

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Spencer Platt/Getty Images

'Unmasking' 101: The Next Chapter In The Trump-Russia Imbroglio

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Intelligence Leaks Complicate Efforts To Renew Key Surveillance Program

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Congress Calls For Vote On Authorizing Use Of Force In Syria

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North Korea Likely To Overshadow Chinese President's U.S. Visit

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Russia Investigation Has Echoes Of Watergate Probe

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In A Story With Many Twists, Congress' Russia Election-Meddling Probe Takes Another

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