U.S. Postal Service Warns Mail-In Ballots May Be Too Late | NBC Nightly News

The U.S. Postal Service sent out an urgent warning, writing letters to 46 states and Washington, D.C., saying it can't guarantee all ballots cast by mail will arrive in time to be counted. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews

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U.S. Postal Service Warns Mail-In Ballots May Be Too Late | NBC Nightly News