Thirdly voting for President Obama is not an endorsement of abortion or marriage. He is not the most radical pro-abortionist, considering abortion laws have been on the books even through the eight years of Reagan and Bush. It's safe to say that those two Presidents said what they wanted you to hear, but didn't really make abortion their top priority. So if you voted for them, you too voted for abortion. See how sick and dumb that logic is.
No matter what the secular law is on these issues, Christians know God's law is still the rule. The problem is too many Christians oppose it publicly, but privately when they go into voting booths they support it, just look at Mississippi. Or privately they allow their teens to seek this as option.