Absurd.
For us to be in arrears, the UN would have to have the power to tax us-which they don't.
I would like to see the U.S. withdraw from the UN. Can you imagine the liberal intellectuals screaming about how the world would turn against us? Heck, the world doesn't like us anyway, and the UN is ineffective (at best!!) at countering the hatred directed at the U.S.
I can already see the liberal argument going something like "Well, the world hates us, and without the U.N., they will hate us even more."