For a comparision of Republican and Democratic Issues and Platforms please go to the following websites:
From the United States Conference of Catholic Bishops:
http://www.usccb.org/issues-and-action/faithful-citizenship/index.cfm
From Priests for Life Political Responsibility Center:
http://www.priestsforlife.org/candidates/index.htm
Here are links to Forming Consciences for Faithful Citizenship (or en Español)