Trump has repeatedly proposed the idea of a blanket 10% tariff on all imported goods.
"What Donald Trump's about to do, is he's going to raise every household's expenses by $2,600 a year," said Haley, citing a figure from the fiscally conservative National Taxpayers Union.
"It's going to raise the cost of anything from baby strollers to appliances, under Donald Trump," she added. "Middle class families can't afford that."
In addition to his proposed 10% universal tariff, Trump has also privately discussed a massive 60% tariff that would be applied to all imports from China, The Washington Post reports.