Donald TrumpDonald John TrumpTed Cruz knocks New York Times for 'stunning' correction on Kavanaugh report US service member killed in Afghanistan Pro-Trump website edited British reality star's picture to show him wearing Trump hat MORE intensified his assault on Jeb Bush Monday morning, deriding his GOP presidential primary rival as a “total stiff” unfit for employment.

“Here is the story on Jeb,” Trump said on MSNBC’s “Morning Joe." "He is a stiff you wouldn’t hire in private enterprise. This is a guy that, if he came looking for a job, you’d say, ‘No thank you.' That’s the way it is. The guy’s a total stiff and he’s not going to win.”

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Trump panned the former Florida governor's education and illegal immigration policies the day before the two compete in New Hampshire's early primary.

“He wants Common Core, and he’s very weak on immigration,” he said. "He wants it 100 percent. And just those two items, he can’t do very well.”

Trump mocked Bush’s understanding of eminent domain, one area where the real estate mogul's rivals have hit him as being a fan of big government.

“He talks about eminent domain. He doesn’t even know what the words mean,” he said. "His family used eminent domain privately on the stadium in Texas that just came out this morning. He forgot to tell you.

“He probably didn’t know because he is not that involved with his family. In fact, he doesn’t even use the last name Bush, which is a mistake.”

In polls, Trump leads New Hampshire’s GOP primary race by 17 percent, according to the latest RealClearPolitics average of polls. Bush, meanwhile, sits in fifth, with 9.8 percent support.