Hillary Clinton isn't the only one worried about Barack Obama's post-Iowa momentum. A former top Republican official tells CNN Obama could win a significant portion of the Republican vote in a general election, if he becomes the Democratic nominee.
The leading Republican strategist, who requested anonymity because this person advises a number of Republican presidential candidates, told CNN "I think Barack Obama is a potential Robert Kennedy or Reagan figure." And "In terms of raw political horsepower, he is the most electable of any of the Democrats and potentially more electable than Bill Clinton. If he ran the right campaign he could appeal to a substantial number of Republicans and Independents."
This person insists an Obama nomination isn't a done deal. "He could make a mistake. His people could get overconfident. He needs to continue to push his theme even as she continues to hit him on different issues."
http://politicalticker.blogs.cnn.com/2008/01/07/republicans-worried-about-obama/