Trump during a rally on Tuesday in Dubuque, Iowa. http://eapcontent.ap.org/jpg/2015/20150826/01/792fbb314d832926800f6a70670071b2.jpg?contentid=792fbb314d832926800f6a70670071b2/fmt=jpg/role=Preview/reldt=2015-08-26T01:00:19/media=Photo/recordid=e5da537e196e44f5a21554e15ff544ec/itemid=e5da537e196e44f5a21554e15ff544ec/objfilename=preview.jpg/authToken=eNotx0EKwyAQQNETKTOjzsSF0KtEY8BFY9BIsvDwbaGb%2f3kzP4GNE7ZIBAwAzoudqQTxtMdoUNltMYo8sVoAdsWrAAuAYKQ5ekj1uFqJ46qtv%2bLo5cj9m1623HSq73ne4U90MMsZ2GoE1vg7ug%2bkUyeH&token=1440815406_D955CD1FA410D91938F1D37C44B8CED6 Republican presidential candidate Donald Trump repeated his claim Tuesday evening that he would stop eating Oreos, citing the cookie maker's decision to close a plant in Chicago and move it to Mexico.

"I'm never eating Oreos again," Trump said, adding that he would consider it if he could find some that were made in the US.

Trump's claim is partly true.

Mondelez International Inc., Oreo's parent company, said last month that it decided to invest $130 million in building four new production lines at a plant in Mexico, which will replace nine older production lines at its Chicago plant.

That will mean the number of jobs at the Chicago plant will go from about 1,200 to about 600, said Laurie Guzzinati, a Mondelez representative. But the plant in Chicago will remain open.

Guzzinati said the decision to invest in the Mexico plant came after discussions with union representatives for workers at the Chicago plant. She said that the company determined that the new production lines would cost $46 million less in Mexico than in Chicago and that labor was "one of many factors."

Guzzinati noted that Oreos continued to be made in some US plants, including in New Jersey, Oregon, and Virginia.

The Mondelez plant in Salinas, Mexico, opened in late 2014, and the four additional production lines are expected to be completed by mid-2016. Two of those lines will make Oreo cookies, Guzzinati said.

Mondelez, which also makes Chips Ahoy cookies and Trident gum, has said its "supply chain reinvention plan" is part of its broader push to slash costs and improve productivity.