Open borders works two ways. With no border our control extends as far as our military and economic superiority. Just take over all these failed countries and run them right. That would make the left’s head explode! But seriously, there could be a plan for certain countries to have the citizens request a U.S. take over. Put in a contractor run government to get things going well. Venezuela would be low hanging fruit.
Or as a poster on another forum put it, “add a few more stars to our flag.”