The 3-inch button by Tigereye Design was intended to show Obama beside Larry LaRocco, the Democratic candidate for U.S. Senate, the Lewiston Tribune reported.
Craig is not seeking re-election following his arrest in a Minnesota airport restroom sex sting.
The buttons weren't ordered by the LaRocco campaign, said Dean Ferguson, LaRocco's communications director. They appear to have been produced by a commercial firm that makes campaign memorabilia involving Democratic races around the country, he said.
"That sounds like it's going to be a collector's item," Ferguson said. "I'm sure Sen. Obama appreciates Sen. Craig's support."
Bill Hall, editor emeritus of the Tribune's editorial page, said he bought 10 from the company's Web site before they were withdrawn and fixed. The Obama-Craig buttons are no longer available for purchase.
"I realized it was a mistake, like finding a coin that's been damaged in the making, so I quickly ordered 10 of them," Hall said.
Neither officials with Tigereye Design nor Craig's office could immediately be reached for comment Sunday.
Local events | Contests | Headlines at a glance