Mathew Wilson and Adam Brooks, who moved from England to Chicago, said the butter sculpture, created by Bob Kling, was to be pushed Friday on a route that ended at the Chicago Cultural Center, the Chicago Sun-Times reported.
"We're bringing two American phenomena together, which is the president and this perennial spectacle of butter sculpting [at state fairs]," Wilson said. "We invite the public to make of that what they will, rather than make a political statement of our own, which would surely be a very dull thing to do."
Wilson said he and Brooks looked "all over" for a butter artist before deciding they had found their man in the Ohio-based Kling.
"It's like any modeling. Obviously, it has to be a cold environment ... ," Kling said.
The sculpture is about 1 1/2-times the size of the president's head, the artists said.