Former Alaska Governor Sarah Palin’s forthcoming autobiography has been at the top of the Amazon book charts for weeks, and it hasn’t even been released yet. At least in the eyes of the political Left, she is now perhaps America’s most visible national Republican. But new Rasmussen Reports national telephone surveying finds Palin losing handily in face-to-face march-ups with her two likeliest challengers for the 2012 Republican presidential nomination. Among likely Republican primary voters, Palin now trails former Arkansas governor-turned-Fox-TV-host Mike Huckabee by 20 points – 55% to 35%. When her opponent is ex-Massachusetts Governor Mitt Romney, Palin loses by...