Donald Trump on Monday night tore into the New Hampshire Union Leader and its publisher following an editorial comparing the real estate mogul to Biff from “Back to the Future” and describing Trump as “a crude blowhard with no clear political philosophy.”

During a campaign rally in New Hampshire, Trump called the Union Leader a “dishonest” and “failing” newspaper, and described publisher Joe McQuaid, who wrote the editorial, as a “low life” and a “sleazebag.”

The Union Leader had previously endorsed New Jersey Gov. Chris Christie (R), prompting Trump to call McQuaid Christie’s “lap dog” on Monday night. Trump also said that McQuaid once told him that he would never endorse Christie.

Trump wrapped up his rant about the Union Leader and Christie by throwing a copy of the paper from the stage and calling it a “piece of garbage.”

Earlier on Monday, Trump suggested in an interview with New Hampshire television station WMUR that Christie asked McQuaid to endorse him.

“This is the way Chris is, and he’s the one who got McQuaid to do this, there’s no question in my mind,” Trump said, according to Politico.

In a Monday night interview with MSNBC, McQuaid responded to Trump’s attacks and said the real estate mogul’s claim that Christie directed the Union Leader to endorse him was “nonsense.”

Watch Trump’s lengthy rant about the New Hampshire Union Leader, McQuaid and Christie via NBC News: