Democratic Rep. Ro Khanna of California warned Tuesday that the nation's economy and talent pipeline could take a hit if international students opt against attending colleges in the United States because of President Donald Trump's visa policies.

"The reality is that you have people like Elon Musk who were foreign students, I mean, they have been embedded in Silicon Valley and the companies that have been created," Khanna said on CNBC's "Squawk Box ."

Khanna, who represents Silicon Valley , said that world-class educational opportunities for foreign students are one of America's "biggest exports of anything."

"You go talk to Stanford, you talk to other state colleges, many of them rely on international students to be able to have the employment they do." Foreign students who

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