The Oath Keepers and Three Percenters, both part of an anti-government extremist movement that has grown since President Obama took office, promote the idea that the federal government is plotting to take away the rights of American citizens and must be resisted. The two groups are apparently trying to make inroads in the U.S. military.  From October 24-25, 2009, the Oath Keepers held their first national conference in Las Vegas, Nevada. About one hundred people reportedly attended…