“Gravel... was a passionate advocate of direct democracy and the National Initiative. In 2006, Gravel began a run for the Democratic nomination for President of the United States to promote those ideas. His campaign gained an Internet following and national attention due to forceful, humorous and politically unorthodox debate appearances during 2007, but showed very little support in national polls or in 2008 caucuses and primaries. In March 2008, he announced he was switching to the Libertarian Party to compete for its presidential nomination and the inclusion of the National Initiative into the Libertarian Platform. At the May 2008 Libertarian National Convention he failed on both counts and announced his political electoral career had ended.”
http://en.wikipedia.org/wiki/Mike_Gravel