NBC Nightly News Broadcast (Full) – August 14th, 2020 | NBC Nightly News

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U.S. Postal Service warns mail-in ballots may be too late, President Trump fuels baseless birther theory about Senator Kamala Harris, and inside the plan to open New York’s schools.

Watch “NBC Nightly News With Lester Holt” at 6:30 p.m. ET…