LAWRENCE TOWNSHIP -- About halfway into his first New Jersey rally Thursday night, Donald Trump brought up a topic he's mentioned numerous times on the presidential campaign trail: how he's given up eating Oreos.

But this time, he joked about Gov. Chris Christie in the process -- and it appeared to be a crack at the governor's weight.

Trump, the presumptive Republican nominee, was discussing trade during his event at the Lawrenceville National Guard Armory, stressing that he's "going to make great deals for our country."

He then reminded the audience that he made the Oreo-free vow after the cookie's maker, Nabisco, moved hundreds of jobs from a plenty in Chicago to Mexico.

"I'm not eating Oreos anymore -- you know that," the billionaire businessman and former Atlantic City casino mogul said. "But neither is Chris."

Trump turned and pointed to Christie, his longtime friend and ally, who was standing to the side of the stage. The real estate magnate was hosting the $200-a-head event to help the New Jersey governor pay off debt from his own presidential campaign.

"You're not eating Oreos anymore," Trump -- who is known for making off-handed quips about sensitive topics -- said to Christie. "No more Oreos."

"For either of us," he added. "Don't feel bad. For either of us."

The governor nodded with a smile and the crowd laughed -- but a bit awkwardly.

Christie, after all, underwent lap-band weight-loss surgery in 2013 and is often the subject of fat jokes by late-night talk-show hosts.

One other note? Nabisco is a subsidiary of Mondelez International, which said despite the move from Chicago to Mexico, some Oreos will continue to be made at three U.S. locations -- including Fair Lawn.

Brent Johnson may be reached at bjohnson@njadvancemedia.com. Follow him on Twitter @johnsb01. Find NJ.com Politics on Facebook.