New Hampshire's largest newspaper, The Union Leader, is the latest target of Republican presidential candidate Donald Trump's attacks against the news media.

Republican Presidential Candidate Donald Trump Campaigns In Nashua, New Hampshire
Donald Trump holds up a copy of the Manchester Union Leader at a rally in Nashua, New Hampshire. (Photo by Darren McCollester/Getty Images)
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What may have caused Trump to react this way?

A front-page editorial Monday by publisher Joseph McQuaid declaring, "Trump campaign insults NH voters' intelligence."

Trump said the paper is "failing" and is calling McQuaid a "Loser," alleging the publisher has asked him for favors in the past.

The Union Leader has endorsed New Jersey Gov. Chris Christie.

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