President Donald Trump confirmed reluctantly that Turkey won’t be able to buy the U.S. F-35 fighter that it helps build after the country began taking delivery this week of a Russian missile defense system.

“We are now telling Turkey that ‘because you have really been forced to buy another missile system, we are not going to sell you the F-35 fighter jets,”’ Trump said at a cabinet meeting on Tuesday. “It is a very tough situation that they are in, and it’s a tough situation that we have been placed in, the United States.”