Sarah Palin's unfavorable rating has spiked to a new high, adding further fuel to the argument that her presidential campaign may be doomed before it begins. A new Bloomberg poll shows the former Alaska governor is now viewed unfavorably by 60 percent of American adults. That's higher than any other poll has shown, but it's not even the entire picture. Of that 60 percent, nearly two-thirds - 38 percent of all adults - say they view the former GOP vice presidential nominee "very unfavorably." No other politicians tested even comes close, including President Obama (22 percent). What's more, Palin's unfavorable...