Stephen Colbert opened his Thursday night show saying he is “concerned” about Secretary of State Rex TillersonRex Wayne TillersonHillicon Valley — Blinken unveils new cyber bureau at State Blinken formally announces new State Department cyber bureau Hillicon Valley — TikTok, Snapchat seek to distance themselves from Facebook MORE.

The “Late Show” host took on the NBC report that Tillerson wanted to resign from his post and called President Trump a “moron,” saying its an indication that the secretary is on his way out.

“That is, generally speaking, something you say right before you quit,” Colbert said.

Colbert poked fun at Tillerson’s press conference, where he denied that he considered leaving the White House, but declined to comment on the “moron” allegations.

“He vehemently would rather not answer that question,” Colbert said.

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The comedian also took jabs at the reported “suicide pact” that Tillerson has with Defense Secretary James MattisJames Norman Mattis The US can't go back to business as usual with Pakistan The Hill's Morning Report - Presented by Facebook - Senate nears surprise deal on short-term debt ceiling hike Overnight Defense & National Security — Pentagon chiefs to Congress: Don't default MORE and Treasury Secretary Steven MnuchinSteven MnuchinThe Hill's Morning Report - Presented by Facebook - Biden to tackle omicron risks with new travel rules Mnuchin and McConnell discuss debt limit during brief meeting Major Russian hacking group linked to ransomware attack on Sinclair: report MORE, with each party vowing to leave if one of them is ousted.

“That’s when you know things are going great at a workplace, when people start forming suicide pacts,” Colbert said sarcastically. “They’ve also agreed that if none of them are with someone by the time they’re 70 they’ll marry each other.”

Colbert's comments follow reports that Trump's and Tillerson's relationship has been tense for months, with the two disagreeing on major policy issues as well as small annoyances, such as the secretary's habit of not returning Trump's phone calls.