From Huffington Post:
NARAL's political director Elizabeth Shipp acknowledged it "would help" the pro-choice movement if a Republican proved it was possible to win the presidency while still supporting abortion rights...
As mayor of New York City, Giuliani had a pro-choice record, which has come under intense scrutiny since he entered the presidential race. In the GOP debates this past May, Giuliani said "it would be okay" to repeal Roe v. Wade, before adding, "But ultimately, since it is an issue of conscience, I would respect a woman's right to make a different choice." In recent weeks, a coalition of prominent Christian conservative figures has threatened to support a third-party candidate should Giuliani win the Republican nomination.
NARAL has yet to announce an endorsement in the 2008 race. But Shipp acknowledged that Giuliani is the lone Republican in the field who could potentially win the organization's support. [Emphasis added]