OT but it is 'Republican' not 'republican', since all the references are to the Republican Party, not to a republican form of government.
This is trickier than it sounds. Because there is also a cost to _not_ purchasing oil from them. I'm not drawing conclusions on which is better, because I don't know, but if you want to destabilize and antagonize already touchy and hostile governments, you couldn't do much better than utterly destroying all of their national economies.
I wonder if this is another USN warning signal about the JSF. By keeping this production line going, it certainly opens up their option of sticking with the SuperHornet as their primary aircraft for a good bit longer. They must reasonably be wondering if one JSF is really worth two and a half SuperHornets, plus the higher operating costs.