New Jersey Gov. Chris Christie called President Obama a "feckless weakling" at Tuesday night’s Republican presidential debate in Las Vegas.

Christie said that as president, he would shoot down a Russian plane if it breached a no-fly zone in Syria, and claimed Obama wasn’t strong enough to do the same.

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“Maybe because I’m from New Jersey I have this plain-language hang-up,” Christie said. "I would talk to Vladmir Putin a lot, and I’d say listen, Mr. President, there’s a no-fly zone and it applies to you and yes we’d shoot down the planes of Russian pilots if they were stupid enough to think that this president was the same feckless weakling that the president we have in the Oval Office is right now.”

Sen. Rand PaulRandal (Rand) Howard PaulNoisy democracy, or rude people behaving like children? Lawmakers, Wall Street shrug off Trump's escalating Fed attacks Five things to watch for in deteriorating US-Saudi relations MORE (R-Ky.) followed up by claiming Christie was a threat to start World War III.