Even considering the source, abortion may be a problem in winning over the center:

The NARAL survey found that when pro-choice women are told that McCain believes the Roe v. Wade decision should be overturned, their support for him drops substantially. Among pro-choice independent women, who are already more inclined to back Obama, information about the two candidates' abortion positions improves Obama's edge from 53-35 to 66-26, for a net gain of 22 percentage points. Even pro-choice Republican women shift their support after hearing about McCain's opposition to Roe: 76% initially say they will vote for McCain in November, but that number drops to 63%.

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