“In my two years in the (elections) office I can only recall a couple of times that we got calls,” about what people were wearing, he said.

“Voters have never given us a problem,” he said.

People wearing campaign shirts or sporting buttons are asked to cover them up before voting, per past practice, he said.

“We’ve never had an issue with this in Mercer County,” he said.

But with popular interest in this year’s presidential election soaring and with Pennsylvania considered a keystone in the winning electoral puzzle, the battle has drawn national and even international attention, according to a Google News Internet search.

That the court might rule and provide hard-and-fast rules on what can and can’t be worn is assuring, Greenburg said.

“My belief would be once (there’s) a ruling there will finally be some uniformity,” he said. “It will be solved one way or the other so this won’t be a problem in the future.”

In Pennsylvania, campaigners must keep 10 feet from the entrance to polling places, he said.

That rule is different from those of other states: At least four states — Maine, Montana, Vermont and Kansas — explicitly prohibit wearing campaign buttons, stickers and badges inside polling places, according to the National Conference of State Legislatures and state officials. In Kansas politickers must be 250 feet from polls, according to Greenburg.

In Kentucky, elections officials last month told poll workers they should admit voters decked out in campaign apparel, after e-mails circulated warning that Obama supporters would be turned away if they wore shirts and pins.

The Associated Press contributed to this report.