Shut it down, it is useless.
No, worse than useless.
The UN long ago lost sight of its initial goal of being a place where the world could come together to talk over problems of mutual concern. Instead, it morphed into the beginnings of a world government that is decidedly anti-American and anti-democratic. All the while, those in charge lived the high life in NYC, got rich, and created abominations like the so-called Human Rights Council. The best thing that could happen now is for the UN to just go away.