Imperial Grand Wizard Cole Thornton says the United Northern and Southern Knights of the KKK is active and successfully recruiting in Colorado, but no membership numbers were available.

Southern Poverty Law Center spokesman Mark Potok tells the Durango Herald the radical right in the U.S. has grown enormously in the last 10 years, particularly since President Barack Obama's election in 2008.

According to the Southern Poverty Law Center, a nonprofit civil rights organization, 12 white supremacist groups are currently active in Colorado.

Colorado has a long history with the KKK. Benjamin Stapleton, who served five terms as mayor of Denver between 1923 and 1947, had ties to the Ku Klux Klan.

There are reports that the Klan took over a resort on top of South Table Mountain in Golden in the 1920s. They reportedly used it as a major meeting and ceremonial place. The resort burned to the ground in an arson fire in 1927.

Learn more about the KKK's history in Colorado in this article by the Colorado Independent.