St. Clair County Republican Central Committee Chairman Bill Zychelwicz accused St. Clair County Clerk Bob Delaney of "blatant and brazen" electioneering.
On Friday, a photographer captured a clerk wearing a "Bob Delaney" T-shirt while assisting a couple obtaining a marriage license.
Zychelwicz said that violates election laws because it happened while absentee voting and grace period voting were allowed.
"It's pretty much the same dirty tricks of Bob Delaney," Zychelwicz said.
"We can't expect that he's going to stop electioneering on election day if he's going to allow it in his own office," he said.
But St. Clair County Clerk Bob Delaney, who is seeking re-election Nov. 7, said there was nothing wrong with the way two employees were dressed.
"It's a cheap political shot," Delaney said.
Delaney said the clerk who was photographed had worked at "Seniorama," a health expo for senior citizens in Belleville, in the morning and returned to work in the office in the afternoon.
He said two clerks from his office passed out literature at Seniorama, but they were not campaigning. It would be different, he said, if they were handing out bumper stickers or palm cards.
Delaney said his office is run "above board."
He also said that county employees are allowed to dress casually on Fridays.