Eric Trump breaks judge's rules by attacking witness Michael Cohen from courtroom

Eric Trump was seen using his cell phone in a Manhattan courtroom after New York Justice Juan Merchan forbade using mobile devices.

NBC News reported that Eric Trump was sitting behind his father when he wrote a message on the social media platform formerly known as Twitter.

"I have never seen anything more rehearsed," he said of Michael Cohen's testimony.

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"The court does not allow anyone in the courtroom to use their cellphones during proceedings," NBC News noted.