America: I'm going to build a wall.
Nazi: Been there.
Soviet Union: Done that.
America: I'm going to build a wall.
Nazi: Been there.
Soviet Union: Done that.
Listen up, buttercup. The joke is that America wants to build a wall, but the Nazi and Soviet Union already did that. Get it? They were all about keeping people in (or out), and now America wants to join the club. You are as sharp as a marble.