Quite a few Americans seem to fear that Obama is extremely, dangerously, liberal. At least a few cherish the hope that, of the candidates, Obama has the bigger element of liberalism in his makeup. It may be that the NARAL people tend to the latter. It may be that they don't see either of the Dem candidates to be a threat to reproductive rights, and that they, a. consider Obama the better choice for any number of other reason, b. perceive Obama to be more electable than Clinton, and thus more apt to keep reproductive rights out of the hands of the Republicans, or some of each.

I've known any number of staunch, outspoken, feminist women by now. By far the most of them have just stood for straight-up equality, with no hatred directed toward anyone. I would see most of them as happy for the chance to vote for a woman if they believed that woman to be as good as any of the other candidates; I can't think of any of them whom I would expect to vote for Britney Spears or Ann Coulter over a male with respectable qualifications. (Yes, I know I'm reducing the point to absurdity so far as that choice of names.)