At the daily coronavirus task force news briefing, the president gave the stern warning just one day after signalling the move on his Twitter account. Mr Trump said he would “protect American workers” by “issuing a temporary suspension of immigration” that could last two months.
“Pausing immigration will help put unemployed Americans first in line for jobs as America reopens,” he added.
“It would be wrong and unjust for Americans laid off by the virus to be replaced with new immigrant labour flown in from abroad.”
The executive order by Mr Trump would affect those applying for green cards or permanent residence.
The situation will be reviewed in two months time owing to the current economic situation.
It comes as the US death toll from the COVID-19 outbreak climbed to 43,000 cases, and it’s been reported that nearly 800,00 have contracted the virus.
Although the president has said that the USA has passed its peak, and will likely reopen for business in the near future.
Mr Trump wrote on Monday: “In light of the attack from the Invisible Enemy, as well as the need to protect the jobs of our GREAT American Citizens, I will be signing an Executive Order to temporarily suspend immigration into the United States!”
Now the move has been confirmed, his supporters have taken to the social media site to praise the president.
One said: “Makes perfect sense to anyone with common sense.”
However, many others have criticised the new regulations.
A tweeter replied: “Immigrants didn’t take away the jobs and businesses our government destroyed. This country was built by immigrants.
“This country is a nation of immigrants. This country will soon deport an administration who blames everyone else for their own failures.”
Another said: “This makes no sense when we were already experiencing the worst labour shortage in history.
Another commented: “Even present and post-COVID 19 there still are not enough physical human beings in the US to fill all the jobs. Dignify and Prisoners and Immigrants and let them work!!! “
The president’s previous attempt to place a ban on Muslims from entering the US three years ago ended up in the courts.
A professor of immigration law at Cornell Law School, Stephen Yale-Loehr said: “It is one thing to suspend immigration for certain categories of people, such as terrorists.
“It is quite another to suspend all immigration. We have never done that before, even during world wars.”
Mr Trump’s Democrat rival Joe Biden has condemned the President’s coronavirus response.
Mr Biden said: “The governor of Maryland — a Republican — had to turn to South Korea to get badly needed tests,”
“Think about that: a governor had to turn to a country halfway around the world for aid.
“Because he couldn’t rely on timely help from a president and a White House that sits just miles from his state’s border.”