The Massachusetts Secretary of State sent a gentle reminder to Hillary Clinton’s camp today — neither former President Bill Clinton, nor anyone else, can campaign at the polls today.

“We received some complaints that he was campaigning, and the office reminded the campaign that state law prohibits campaigning within 150 feet of a polling place,” said Brian McNiff, spokesman for Secretary of the Commonwealth, William F. Galvin.

The former president was on the road today in the Bay State, shaking hands at polls at several stops. However, no evidence was presented that he was actively campaigning at the polls, and just being there isn’t enough to run afoul of Massachusetts’ election laws.

“Going into a polling place to shake hands, that’s not considered campaigning,” McNiff said. “There was a big crowd around when he did come, and I think people were upset at that. But campaigning is not simply being in the place.”

Bill Clinton was in West Roxbury, Newton and New Bedford today.

McNiff added that there have been no similar complaints levied against other campaigns.

One concern is that simply having the former president — husband of the Democratic frontrunner — on scene would be a de facto campaign sign, but McNiff said state law doesn’t get into those particulars.

“I don’t think that’s spelled out in the law,” he said. “People might have various opinions on that, but as long as he’s not campaigning and is just shaking hands like candidates do, it’s not a problem.