Ralph Giles, the vice president of product design at Chrysler, blasted real estate mogul Donald Trump via Twitter on Thursday.

Trump, who has campaigned with Republican hopeful Mitt Romney, accused President Barack Obama of being "a terrible negotiator" on Twitter, adding that the President "bails out Chrysler and now Chrysler wants to send all Jeep manufacturing to China--and will!"

Giles bluntly responded, "you are full of shit!" Hours later, he added, "I apologize for my language, but lies are just that, lies. Thanks for the support People."

The Romney campaign has claimed Jeep is shipping American jobs to China. But Chrysler described the claim as “a leap that would be difficult even for professional circus acrobats.” PolitiFact also said the claim was completely false.

Earlier this year, Romney was asked about his association with Trump, who also doubts whether Obama was born in the United States. Romney said he doesn’t agree with every single opinion held by “all the people who support me,” and added: “But I need to get to 50.1 percent or more [of the electorate] and I’m appreciative to have the help of a lot of good people.”