Salon is losing one of its marquee names, fire-breathing blogger and former constitutional lawyer Glenn Greenwald, who will move his daily writing to the U.S. edition of the Guardian, where he'll also write a weekly print column, Politico reports. "I have nothing but the highest regard for Salon and its commitment to independent and provocative journalism," Greenwald writes today. "But sometimes sustaining one's passion and sense of challenge requires change." He's been at Salon for more than five years since moving his solo Blogspot to the enduring online magazine. At the Guardian, Greenwald will join a beefed-up roster of brand-name Stateside columnists like Ana Marie Cox and Naomi Wolf.