Chrysler’s chief executive on Tuesday strongly refuted claims that production of Jeeps would shift to China, an insistence that cast further doubt on the Romney campaign’s recent efforts to undercut President Obama’s support for the auto industry as it fights for Ohio’s 18 electoral votes.

In an e-mail to employees, the chief executive, Sergio Marchionne, said that Jeep’s commitment to the United States was unequivocal. “I feel obliged to unambiguously restate our position: Jeep production will not be moved from the United States to China,” he wrote. “It is inaccurate to suggest anything different.” …

The Romney campaign has come under considerable criticism in recent days for taking liberties with the facts in a new television commercial that suggests Jeep, a recipient of federal bailout money, will soon outsource American jobs to China. Chrysler, Jeep’s parent company, does not in fact have plans to cut its American work force but is considering opening a facility in China where it would produce Jeeps for sale locally.