Ain't that a kick in the head?

I don't get it, is it fallout or something?

This is all a moot point because the Legion already took the Hoover Dam in our world. We're on the ending slides where they enslave and purge their enemies. The bull defeated the bear after it got lucky the first time, and the corporate elites are making sure to liberal democracy out of its misery so they can rebuild the America in their image.