I think the best thing we can do as Christians is be informed politically and try to vote in pro-life politicians.
Here is a good pro-life site (Catholic??), that shows how Representatives from each state voted on a variety of bills that is explained.
http://www.capwiz.com/nrlc/scorecard...=110&x=13&y=13
The higher the score on the right, the more pro-life (by this site's standards). I live in Connecticut, one Republican voted to support just one bill for a total percentage of 14%, all the rest scored 0%. Horrible.
Take a look at the maps (click on the red numbers for each bill) and you see the same pattern over and over. The Southern, and Western states are generally pro-life, New Enland, the Midwest, and the West Coast are pro-death.
I think this is significant, the Southern and Western states tend to be more religiously conservative, the other side less so. This is a religious issue whether anyone cares to see it or not.
If Christians could educate their fellow citizens, then perhaps we could vote out the liberal pro-death politicians and elect those pro-life. This is the only solution I see (plus lots of confession and prayer to God).