Well, Mitch can be wrong when it comes to some of those "blue-dog" dem districts where they come in as paper tiger "pro-lifers"...sometimes, it's been enough to salve the consciences of pro-life Dems & pro-life independent voters who think there's "no difference" between the Repub & Dem candidates.
And frankly, the way so many R candidates are so "milquetoast" on behalf of the pre-born, in the 1 on 1 comparison, there often isn't any difference compared to the blue dog dem -- at least in protecting the pre-born.