Geraldo Rivera, who has battled fellow Fox News Channel personality Bill O'Reilly over immigration reform, lashed out Wednesday at Lou Dobbs, who appears on rival CNN and who has made the issue his personal cause célèbre. "He has resurrected a failed career on the backs of these poor [Mexican immigrants]," Rivera remarked on Barbara Walters's Sirius Radio show, where he was promoting his new book, His Panic, which is subtitled, "Why Americans Fear Hispanics in the U.S." Rivera added, "He has been rabble-rousing, making a difficult situation worse." Earlier this month, in an appearance on Walters's TV show The View Rivera accused Dobbs of using his TV platform for "hate mongering" and remarked that "I would not shake his hand."