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I think it's funny, but not presidential. Trump has very thin skin. There's a difference between being tough with people on your level - and bring petty, going out of your way to start a public feud with everyone who has ever said anything negative about you.
Trump is the master of the feud... he knows people like that. He's always had a Rosie or whoever, keeping in the headlines. now he's making hay out of the daughter of a war veteran because she doesn't like his inconsistent/unclear policies.