Newly-minted Libertarian presidential nominee Gary Johnson slammed Donald Trump's immigration plan on Wednesday.

"[It's] unbelievably misinformed, unbelievably incendiary when it comes to these remarks," Johnson said in an interview with CBSN's Josh Elliott.

Johnson, the former Republican governor of New Mexico, said he was referring to Trump's previous remarks about Mexicans being murderers and rapists. Johnson said that "statistically, they commit less crime than U.S. citizens" and they're "not taking jobs that U.S. citizens want."

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"Building a fence across the border?" Johnson said. "It's crazy. Make it as easy as possible to come into this country to work."

Johnson said that Trump has said "a hundred things that I think would've disqualified any other candidate."

He went on to point out that a wall across the border wouldn't be practical because of the Rio Grande.

"We're going to build a wall on our side, and cut out the Rio Grande River, or we're going to build it on their side. They're going to allow that and cut the Rio Grande?" he said. "Oh, I get it, we're going to build it right down the middle. How is that gonna work?"

A Fox News poll last month found Johnson polling at 10 percent in a match-up against Trump and Democratic front-runner Hillary Clinton. William Weld, a former Republican governor of Massachusetts, is Johnson's running mate on the Libertarian ticket.