I don't think it hurt the GOP at all. Sure, the GOP was generally feckless and inept (nothing new there), but at least Republicans were mostly on the side of life.
I don't know how many of you saw the remarks by Terri's sister and brother following her death. I thought they were very inspirational and would recommend finding a transcript if you didn't see it. (I was a bit disappointed in Jeb's statement following her death; I think bro. POTUS' statement was much stronger and better.)
James Taranto at the WSJ has been documenting the dramatic shift of sentiment of "disabled" people from 2000 through the present. In the end, there is virtually nobody who will vote against a republican because of this issue alone, but there are potentially a few million disabled and left leaning catholics who will now view the GOP more favorably. See Taranto's op-ed in today's WSJ.