Trump also put into effect the Defense Production Act, which he's using to order General Motors to produce ventilators.
"Our negotiations with GM concerning its potential to provide ventilators have been productive, however our combat in opposition to the virus is simply too pressing to enable the give-and-take of the contracting course of to proceed to run its regular course", he mentioned.
Those familiar with ventilator production and auto manufacturing plants say it would be next to impossible for Ventec and GM to deliver 40,000 machines "right away" as Trump's tweet suggested.
General Motors has been partnering with the Ventec Life Systems for helping the increase in production of the ventilators which are needed in the hospitals which are dealing with the patients who have the coronavirus, the company had announced on this Friday.
GM said it has worked with UAW to bring back employees from the Kokomo and Marion facilities. The automaker has even started hiring because the 300 workers on staff won't be enough to handle the proposed volume, a person familiar with the situation said.
GM said efforts to set up tooling and manufacturing capacity at the Kokomo facility are underway to produce the ventilators.
Dr. Anthony Fauci, one of the lead members of the White House Coronavirus Task Force, told CNN on Sunday that coronavirus could kill between 100,000 and 200,000 Americans and infect millions of people.
GM is also temporarily converting its plant in Warren, Mich.to make Level 1 surgical masks, according to the release.
"You go into major hospitals sometimes, and they'll have two ventilators", said the U.S. president.
"We did activate it with respect to General Motors and hopefully - maybe we won't need the full activation we'll find out", he said, after calling the vehicle company "General Electric".
GM has announced that it will work with Ventex Life Systems with them starting to ship as early as next month.
State leaders and hospital administrators have urged Trump to invoke the law for weeks as they have struggled to get their hands on ventilators and other scarce but critical medical supplies to treat coronavirus patients.
"We got hit by the invisible enemy, and we got hit hard", Trump said, adding, "I think we are going to have a tremendous rebound". "And now all of a sudden they're saying, 'Can we order 30,000 ventilators?'"
New York, Michigan, Louisiana and Washington state are current hot spots and the total of U.S. cases has surpassed those confirmed in China and Italy.