The majority of Christians, who are not members of the Catholic denomination, vote pro-life republican.
The majority of the Christians who are members of the Catholic denomination, vote pro-abortion democrat.
This is important information for conservatives and pro-lifers.
Obama had an approximately 2 - 3% advantage among Catholics in the 2012 presidential election. Hardly a significant majority. However, the fact that Protestant membership is declining in the U.S. is certainly a fact worthy of consideration by conservatives and pro-lifers.