Steve Hilton said Rep. Alexandria Ocasio-Cortez's proposed Green New Deal is "seriously bad policy," and he predicted it will be "the gift that keeps on giving" for President Trump and Republicans.

The sweeping proposal -- which Ocasio-Cortez and Sen. Ed Markey (D-Mass.) introduced last week -- aims, among other things, to make air travel obsolete, upgrade or replace every building in America to ensure energy efficiency, provide health care for all Americans and give economic security even to those "unwilling" to work.

After President Trump during his El Paso rally Monday night criticized the deal as resembling "a high school term paper that got a low mark," Ocasio-Cortez fired back on Twitter, writing, "Ah yes, a man who can’t even read briefings written in full sentences is providing literary criticism of a House Resolution."

On "America's Newsroom" Tuesday, Hilton said Trump wasn't criticizing the literary merits of the proposal, but it's policies, which Hilton said would have "devastating" real-world consequences.

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"It's not about the words, it's not about the language, it's not about the literary aspects of it. It's about the reality of what happens if you try to implement what they say," Hilton said.

He noted that the core of the Green New Deal is moving to a zero-carbon energy system within ten years, which would decimate many industries related to oil and gas production.

Hilton said many on the left support the big, aspirational ideas in the proposal, but they don't want to focus on the details of the policies or how they would be paid funded.

He added that Republicans are right to call the Green New Deal a disaster, but they should have put forth a "positive alternative" that will address environmental concerns without "uprooting America's economy."

He said he finds it amazing that 2020 Democratic presidential candidates like Sens. Kamala Harris (Calif.), Cory Booker (N.J.) and Amy Klobuchar (Minn.) are backing the deal, and he predicted it will be a "millstone around their necks."

"No serious candidate has ever put forward something as dramatic as this and as damaging as this in recent years."

Watch more from "America's Newsroom" above.

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