20/20 anchor John Stossel is leaving ABC for Fox News and the Fox Business Channel, Mediabistro reports. The move is yet another shakeup for ABC—Stossel’s co-anchor Elizabeth Vargas is a frontrunner to replace Diane Sawyer on Good Morning America. Stossel, a frequent guest on Fox, will have a 1-hour weekly show on the business channel and produce consumer specials for Fox News. (More John Stossel stories.)