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Donald Trump spent part of Monday night insulting late-night hosts including Jimmy Fallon,Watch When the Camellia Blooms Online Stephen Colbert, and Jimmy Kimmel. Of course, they'd respond, but how?

During a rally for South Carolina Gov. Henry McMaster, Trump railed against all three comedians, calling Colbert a "low life" and Kimmel "terrible."

But Trump especially went after NBC star Fallon, who he called a "lost soul." Fallon was criticized by liberals for playfully ruffling Trump's hair, a moment he publicly said he regretted, causing Trump to tweet the insult "be a man," to the late show host.

Fallon already responded on Monday night, saying in his opening monologue, "Shouldn't he have more important things to do? What are you doing? You're the president. Why are you tweeting at me?"

But we had yet to hear from Colbert, who Trump wouldn't actually refer to by name in his speech. Trump simply referred to "the guy on CBS" as a "low life."

So, dubbing themselves "late night low lifes," on Tuesday's The Late Show, Colbert and Fallon teamed up, calling in the big guns, fellow late show host Conan O'Brien, to decide on how to respond.

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According to The Tonight Showproducer Mike DiCenzo, both Fallon and Colbert will run the clip to open their programs on Tuesday — a rare occurrence for late night shows.

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Not too sure where Kimmel was, but all we know for now: Don't mess with "the guy on CBS."

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