DOJ official: ‘No question’ China is top intelligence threat to the U.S.

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In an exclusive interview with NBC’s Cynthia McFadden, John Demers, Assistant Attorney General for National Security, discusses Chinese espionage efforts after a California man was charged with acting as an illegal foreign agent. Watch more tonight on “NBC Nightly News With Lester Holt” at 6:30 p.m. ET / 5:30 p.m. CT.