“Late Show” host Stephen Colbert took aim at one of President Donald Trump’s sore spots on Wednesday evening, mocking the administration’s failure to foresee a key consequence of the war in Iran.

Trump likes to portray himself as a successful businessman when, in fact, many of his ventures ― including a casino, steaks and an airline ― have flopped.

Yet somehow, the spike in oil prices ― along with a jump in gas prices at U.S. pumps ― reportedly caught the administration off-guard, according to a Politico report cited by Colbert.

“Somehow, President Businessman didn’t see all this coming,” Colbert cracked, adding in disbelief: “You were surprised that bombing the place the oil comes from makes the oil cost more?”

Trump himself posted about the price jump, calling it a “small price to pay” for the war effort.

“Easy for him to say. He doesn’t pay for his own gas,” Colbert said. “That’s anyone who stands behind him.”

See more in his Wednesday night monologue: