He did that after discovering that the stranger tipped one of his favorite waitresses just 74 cents.
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But it wasn't just the name-calling that had some on the side of the skimpy tipper.
Senator Declan O'Scanlon actually published a photo of the $119 bill with the man's full name, signature, and last four digits of his debit card.
In the republican politician's tweet, he called diner Anthony Dierolf a jerk with misplaced obnoxiousness and said Ashley is a great waitress and a wonderful human being.
Though most applauded the lawmaker for standing up for Ashley, others questioned whether it was appropriate or even legal for an elected official to expose someone.
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But both O'Scanlon and the customer, Dierolf, are standing by their behavior.
O'Scanlon says the information he posted is something left on countless restaurant tables and even shared a receipt of his own.
As for Dierolf, he told a New Jersey newspaper he gave Ashley a terrible tip because the service was terrible and slow.
He's now considering taking legal action against O'Scanlon.
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