Nearly a week after invoking his powers under a Korean War-era law to compel General Motors to manufacture ventilators for coronavirus, President Donald Trump’s administration has not formally ordered any of the machines, USA TODAY has learned.

As governors warn of severe shortages of ventilators, Trump has been hesitant to use his wartime powers to force companies to ramp up production under the Defense Production Act, arguing that such an order amounts to a takeover of private industry.

But Trump said Friday he would use the act to require General Motors to make ventilators after what he described as a dispute with the company over supply and pricing. Three administration officials speaking on the condition of anonymity told USA TODAY that the government is still exploring its options and has not yet placed an order under the Defense Production Act for any of the machines.