The two-minute video features a computer-generated voice denouncing what it calls a corrupt political system that favors corporations and calls on supporters to "peacefully shut down the first-in-the-nation Iowa caucuses." The video claims to be from Anonymous, a loosely organized group of hackers that has claimed credit for attacks on targets ranging from the Peruvian government to Paypal.

 

A former activist for Occupy Des Moines, Clarke Davidson, has acknowledged posting the video on YouTube. He said he did so after masked men left it outside his tent near the state Capitol on Nov. 3.