Surely you wouldn't give up on voting just because of one issue. I'm pro-life as well, but just because a Pro-Choice democrat was nominated, or a pro-choice republican... even if both were pro-choice i'd still vote. I wouldn't even think twice.
For local and tate officials, yes, but President is too important to have a pro-abort. I simply couldn't do it...at least not now as I look forward. The only one I'm not sure about is rice, as she is more moderate on abortion than some dems, but her stance still bothers me.
But if it were say, Rudy vs. Hillary, I would not vote.