You may want to ask members of your own parish. According to statistics, probability is that at least half of them must have voted for Obama. The fact is that abortions didn't stop under the Bush administration and that the president has very little if any power to change the abortion craze of this supposedly 75% Christian nation. But the president has a great deal to say who goes to war and who doesn't.
You have the sensibilities of a Jacobin. More people have been killed BY THEIR OWN GOVERNMENTS than by war in the past century, yet like all anti-war leftists you think being anti-war is a more pious position. The president can choose wisely to have justices that are not pro-infanticide on the bench, they can ensure policies that won't tax pro-life Catholics to fund the American holocaust. Voting for a dem (or is it the old shibboleth of racism that bothers you?) who supports the slaughter of the innocents and doing it under the guise of a higher principle is again, evil.