Forty-eight-year political veteran President Biden raised eyebrows on Wednesday when he claimed to have driven an 18-wheeler truck — a claim the White House struggled to defend.

Biden was visiting a Mack Truck facility in Pennsylvania when he made the claim to have driven the massive trucks before, which require a special kind of license.

"I used to drive an 18-wheeler, man," Biden said on Wednesday in a video posted to Twitter. "I got to."

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There is scant evidence that Biden has ever driven an 18-wheeler truck.

When asked if the president had ever driven such a truck, a White House spokesperson pointed to a December 1973 article from the Wilmington Evening Journal that showed Biden rode in an 18-wheeler on a 536-mile haul to Ohio.

Fox News pressed the spokesperson about the president’s claim – noting that riding in a truck is not the same as driving one – at which point the president's spokesperson pointed to a United Federation of Teachers post that touched on Biden driving a school bus in the past as a summer job.

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The majority of school buses, on average, "have two axles, with the bigger models having two wheels on the front axle and four wheels on the dual axle, for a total of six wheels," according to SchoolBusFleet.com.

Fox News pressed again about the president’s claim, pointing out that a school bus is not the same as an 18-wheeler truck, but did not receive a response by publishing time.