The only way I can see something really hurting the politicians is if the suppliers for raw materials to Magpul also started closing up shop and moving as well, but seeing as such suppliers must be lucrative in their business in the event of such a thing as their major provider packs up and leaves. That is not likely to happen.
Regardless, I applaud Magpul for doing what they're doing, it's a shame that it's come to this since I'm sure a lot of innocent collateral damage (income wise) will occur from this move.
Even worse still, as Glenn said, the politicians don't give a rats rear end, because they get exactly what they want. One less business that sells evil "x" item out of their state.