The most realistic political simulation on the internet, and the first of its kind, US Gov Sim.
www.usgovsim.com
http://worldsimulations.com/USG/index.php?act=idx
You start out as a Representative in the House. Through realistic elections, you can be a Senator, Governor and maybe even President. We have a working Supreme Court and both Houses are active. News updates occur almost daily, providing a dynamic world for politics.
In the game, I am Dana Ingram, a Governor and a Republican. The Republican party is home to most Libertarians, like myself. I hope to see you there, it's alot of fun.