With the clock running down on a long-fought primary, NARAL Pro-Choice America leaders sent state affiliates reeling this week by endorsing Sen. Barack Obama of Illinois. It was seen as a gratuitous slap in the face to a longtime ally, and it sparked a fear even closer to home: that the move will alienate donors loyal to Sen. Hillary Rodham Clinton of New York. Many on this week’s conference call were stunned on learning the news, making urgent pleas for the group to remain neutral until after the June 3 Democratic primaries. “It’s created a firestorm,” said NARAL Pro-Choice New...