Hmmm. But for what reason? I can't see any reason for US to ban Bitcoin. US has a lot of bitcoin user and banning it will be a problem. It can even cause for their Citizens(Bitcoin Users) to Debate against their Government. Bitcoin's community in US is doing fine and there is no Good Reason for their Government to ban bitcoin.

But there is a possibility for them to ban bitcoin. Like how if they are forced to ban bitcoin due to illegal transactions and activities. I'm sure no one can stop their Government. But they must decide wisely or else its a big trouble.