Why?
The best made, best selling cars in US history are both Japanese brands, wholly built here: the Honda Accord, mostly in Ohio and the Toyota Camry, mostly in Kentucky.
Honda and Toyota both produce engines, transmissions, drive trains and electronics here as well, of world class quality and exported to their production facilities all around the world.
Millions of good paying middle class jobs result from this work.
There is no reason for Ford to back out of a deal they already thought was a good one.
Unless they are reading the writing on the wall as the new regime in DC directs government moves to ban the new sale and manufacture of ALL ICE vehicles.