U.S. President Donald Trump said Monday the U.S. government should get a “substantial portion” of the sales price of the U.S. operations of TikTok and warned he will ban the service in the United States on September 15 without a sale.

The turnaround came after Trump Friday he said he was planning to ban the Chinese-owned video app’s U.S. operations as soon as Saturday after dismissing a possible sale to Microsoft.