An invitation-only conference of wealthy conservative activists organized by the billionaire brothers Charles and David Koch will convene just outside Vail, Colo., this weekend.
Common Cause -- a group that describes itself as nonpartisan and headed by a former Democratic congressman -- and ProgressNow Colorado have organized a protest outside the Ritz Carlton at Bachelor Gulch, where they believe the conference will be held.
The groups have urged their followers to arrive with signs that read, "UnVail the Kochs," "Corporations are not people," and "Stop the War on the Middle Class."
This is the second Koch-organized conference this year. The previous event, held in late January in Palm Springs, drew about 800 to 1,000 protesters who rallied against the Kochs' libertarian agenda. About 25 protesters were arrested for trespassing.