“He’s a real lowlife, there’s no question about it,” Trump said on New Hampshire television station WMUR on Monday in response to a front-page editorial by McQuaid that compared the Republican presidential candidate to the villain Biff Tannen from the “Back to the Future” movie series.

“He’s a very dishonest man,” Trump added.

Trump said he had performed many favors for McQuaid, including buying ads and visiting his country club. But Trump did not participate in a Union Leader-sponsored candidate forum in August, which Trump said he assumed was the reason behind McQuaid’s editorial.

“I think I should get credit for vision, because his debate was a joke,” Trump said. “I knew when I didn’t do the debate he would take action against me.”