Kevin Stocker, the Republican who is challenging Sen. Mark Grisanti in a primary, hasn’t taken a position for or against the state’s same-sex marriage law.

But in a phone interview, Stocker said he felt the issue should have been left up to voters in a direct referendum — a provision New Yorkd doesn’t have, unless it is a constitutional amendment.

“I believe that issue should be kept on the ballot, it should not be bought on a paid for by special interest groups,” Stocker said. “Me personally, I need to weigh that personal decision, but I believe it should be left up to the voters.”

Stocker’s nuanced stance on gay marriage stands in contrast to the other two Republicans challenging the GOP senators who voted in favor of the law last year. Both Kathy Marchione, who is challenging Sen. Roy McDonald, and Neil Di Carlo, who is facing off against Sen. Stephen Saland, are opposed to the meausre.

Stocker, a lifelong resident of Erie County, said his bigger issue with Grisanti is what he considers to be a record of breaking promises.

“When he first ran for office, he said he would be a lifelong Democrat and that was a broken promise,” Stocker said.

Stocker said he’s taking his message door to door around the newly drawn district, which was crafted by Republicans in Albany to maximize GOP votes fo Grisanti, considered one of the most vulnerable incumbents in 2012.

Stocker’s stance is a populist one, saying the Republican Party has lost its way both nationally and locally.

“I think the Republican Party from the federal level down to our Erie County level, I think they’re lost,” he said. “We’re a blue collar town, we have people who take care of our communities, we do not come from millionaires and billionaires.”

Stocker is critical of the 2 percent limit on property tax increases, which he said is full of too many loopholes.

“It’s disengenuous at best to call that a cap,” he said. “You can’t say it’s 2 percent and have all those loopholes and call it a cap.”

And he wasn’t enthused about Gov. Andrew Cuomo’s record, either.

“I think he talks a good game, I don’t believe he backs it up,” Stocker said.

Grisanti has a gigantic war chest, mostly thanks to his yes vote for the marriage law. The Republican’s re-election campaign has already kicked into gear, with several television ads already running and a biographical mailer aimed at new voters.

Stocker will likely have some help from Buffalo businessman Carl Paladino, who has pledged to knock off incumbents like Grisanti this year. But Stocker says he and Paladino haven’t met to discuss the race yet.

“I don’t think Carl’s come out publicly,” he said. “Right now, I’m not worried about that type of support.”

He added that he welcomed “any and all support” and wouldn’t shy away from campaigning with Paladino.