No, it’s more complex than that. Trump cut the US’s contribution the UN by that amount. The full budget of the UN is far far greater than the $265 million in question here. The full UN Budget is in the neighborhood of $5.4 billion, of which the US paid roughly 22% based on the size of the US economy. There have been criticisms for 15–20 years that the UN budget was bloated and uncontrolled. These criticisms go back to Reagan and before. And there have been complains for years that the US’s percentage was far out of proportion when compared to other economies and countries. read this All of this is a long way of saying that this particular US move was coming for decades; Yes, Trump is making political hay out of it, but the US support for the UN was at crazy levels for years. Eventually the reckoning was going to come. No! – it has practically nothing to do with the Jerusalem vote. Given the antipathy towards the US from other members, and the minimal effectiveness of the UN since its founding, one could argue that US interests are not well served by membership in the UN.