President Trump on Friday reiterated his call for Mexico to end illegal immigration to the U.S., threatening to shut down the border as soon as next week if his demands were not met.

“If Mexico doesn’t immediately stop ALL illegal immigration coming into the United States [through] our Southern Border, I will be CLOSING the border, or large sections of the Border next week,” he announced on Twitter.

Trump said closing the border would be “a good thing” for the U.S. because “we lose so much money” to Mexico.

The DEMOCRATS have given us the weakest immigration laws anywhere in the World. Mexico has the strongest, & they make more than $100 Billion a year on the U.S. Therefore, CONGRESS MUST CHANGE OUR WEAK IMMIGRATION LAWS NOW, & Mexico must stop illegals from entering the U.S.... — Donald J. Trump (@realDonaldTrump) March 29, 2019

....through their country and our Southern Border. Mexico has for many years made a fortune off of the U.S., far greater than Border Costs. If Mexico doesn’t immediately stop ALL illegal immigration coming into the United States throug our Southern Border, I will be CLOSING..... — Donald J. Trump (@realDonaldTrump) March 29, 2019

....the Border, or large sections of the Border, next week. This would be so easy for Mexico to do, but they just take our money and “talk.” Besides, we lose so much money with them, especially when you add in drug trafficking etc.), that the Border closing would be a good thing! — Donald J. Trump (@realDonaldTrump) March 29, 2019

The president said Thursday during a campaign rally in Michigan he would “close the damn border” if Mexico did not stop migrant caravans trying to cross the U.S. border.

Trump declared a national emergency at the border in February after Congress refused to grant him his requested funding for a border wall. The declaration allowed Trump to bypass Congress and redirect federal dollars for the wall.