Your next best thing in USA seems to be Ron Paul. He's one of the very few and maybe the only one in Senate who defended Wikileaks, and he'd probably defend Bitcoin, too, as well as other Internet related issues. But the USA political system seems very rotten anyway. I'm not sure even Ron Paul can do much. They'd either try to beat him into submission (figure of speech) to do what they want, or assassinate him (if he actually wants to do all the things he's been promoting - no wars, no federal reserve, small government, etc).
I like this video about him (fan made):
http://www.ronpaul.com/who-is-ron-paul/
But I think the only thing that can save America right now is a major economic crash and a major drop of the dollar (to make them really prioritize the budget and to get people very angry with the system), followed by a revolution that will lead to overhauling the system.
I think we need politicians to be a lot more accountable for their decisions, and we need a more direct way to send our feedback than just a vote every 4 years on one of the parties, and we need this all over the world, not just in USA.