"It is the height of hypocrisy for President Obama to claim he cares about products being 'Made in the USA' when his administration bullies American companies trying to do just that," Haley said in a statement on Sunday.
South Carolina saw Obama and his National Labor Relations Board put union bosses ahead of American business and workers when they sued Boeing in 2011, she said.
"Clearly, we need leadership in the White House that will fight for all American jobs and all American workers - not just those approved by his friends running big unions," Haley said.
Haley, one of the rising stars of the Republican Party, issued the statement after Obama in his election campaign speeches in Florida emphasised on the manufacturing sector and described how the manufacturing sector has bounced back under his administration.
"I've got a plan to export more products and send fewer jobs overseas. After a decade of decline, this country has actually created more than half a million new manufacturing jobs over the last two and a half years. We reinvented a dying auto industry that's back on top of the world," Obama said in Florida.
"I want to help American factories and small businesses export more. We can create a million new manufacturing jobs the next four years. You can make that happen," he had said.