I would encourage you to view this interview between Mark Driscoll and Randy Alcorn. It's excellent and rightfully deserves a response from evangelicals who label themselves "pro-life" but then vote for pro-choice candidates. I'll be blunt; I know of no more contradictory stance held by younger evangelicals today, a stance which is both naive and appalling.
I've recently completed a term paper on a Christian understanding of public morality. In it, I made the assertion that individual acts create cultural habits and moods (which, I know, is not a novel concept), that eventually contributes to what Robert P. George labels as a "moral ecology." On the abortion issue, evangelicals have the unique ability to stand on the side of celebrating a culture of life. How sad that, on such an important issue, younger evangelicals are contributing--surreptitiously--to the pro-choice movement's "culture of death."