The Pentagon should just send the ammunition. Who's going to stop them? Oh no, the Republicans will sue to have it stopped. Who's going to enforce the order? Stop fucking around with these traitors.
Edit: Better yet, how about an Executive Order? Something like, "The Russian war of aggression against Ukraine, being a direct threat to the security of our NATO allies and our National Security, I declare that any military, intelligence, and humanitarian resources, whether initially allocated for other purposes or not, may be diverted to aid Ukraine."
Then Congress can feel free to pass aid to Israel and it can just be diverted.