The Political Machine is a strategy game that puts you in the role of campaign manager for a Presidential candidate. It's available at most retail outlets in the United States or at PoliticalMachine.com.
In the game you must take campaign on the issues facing the electoral as you compete against an opponent controlled by the computer or someone via the Internet to win the Presidency.
It recently won Computer Gaming World's Editor's Choice Award.
Version 1.02 addresses some compatibility issues as well as enhances the endorsement system to take into your political affiliation to determine how hard it will be to get their endorsement.
Download: The Political Machine