We can make leverage elsewhere where realistic and good alternatives to US purchases exist, the fighter program really isn't one of those.
Literally every program in DND and every industrial sector is going to say this.
The pain will be spread. And we'll all move on. Buying 65 Panthers would leave us no better or worse off than Harper would have done.
Also, the very fact that LockMart is negotiating shows that these decisions are quite impactful and that they perceive we have leverage.