BUSH-MCCAIN CHALLENGE 05/28/2008 Moveon.org is a website set up to allow people to voice their political opinions. It's known as a grass-roots type of campaign, and is also known as a Politcal Action Committee. The Bush-McCain challenge is set up to inform voters of the similarities between the current president and who he hopes will be his successor. URL1: http://www.moveon.org