Charles Krauthammer explained on "The O'Reilly Factor" tonight why the nuclear agreement with Iran is the worst deal the U.S. has signed since the Munich Agreement in 1938.

Krauthammer said the deal means that Iran is no longer a pariah state. The country will be open to commerce and business and will be able to import weapons in just a couple years.

Krauthammer added that Iran's economy is about to get a $150 billion injection and will be able to triple its oil output to more than $320 million per day.

"It's dominating the region, threatening our allies. And what have we gotten in return for all of this?" Krauthammer asked. "A pathway that will guarantee that Iran will not just be a nuclear-armed state, but will have a large arsenal of nuclear weapons in about 10 to 15 years."

And that's assuming they honor the treaty, which is highly unlikely, Krauthammer said.

Watch the two-minute breakdown above.

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