LIVE: The arraignment of Donald Trump

 NBC News NOW provides live coverage as Donald Trump becomes the first former president to face criminal charges.

• Donald Trump pleads not guilty to 34 criminal counts in historic court appearance, source says 
• News outlets will face slew of coverage conundrums as Trump is arraigned on criminal charges 
• Trump asks appeals court for emergency order blocking testimony from top aides in DOJ's Jan. 6 probe 

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