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The Hillary Clinton campaign didn't take long to respond to Donald Trump's comments about how Russia should try to find Clinton's missing 33,000 emails.

“This has to be the first time that a major presidential candidate has actively encouraged a foreign power to conduct espionage against his political opponent," senior policy advisor Jake Sullivan said. "That’s not hyperbole, those are just the facts. This has gone from being a matter of curiosity, and a matter of politics, to being a national security issue.”

Charles Krauthammer said on "Special Report" tonight that Trump set a trap, and the Clinton campaign fell right into it.

He explained that the Clinton campaign statement said it would be a "national security issue," which contradicts Clinton's repeated assertions that the missing 33,000 emails were all of a personal nature, not work-related.

"If that's what's really in the 33,000 emails, then there's no national security to be involved at all," Krauthammer said. "So the Clinton campaign ends up admitting that perhaps there really is work-related - if not classified - stuff on the emails which she deleted."

Krauthammer said that could be grounds for a charge of obstruction, declaring that the Clinton campaign has been caught in a "complete contradiction."

Meantime, Trump has since said on Fox and Friends that his comment about the emails was "sarcastic."

Watch more above.

You can hear from Hillary Clinton in her first post-convention interview on Fox News Sunday at 2pm and 6pm ET on Fox News Channel.

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