Ron Paul isn't a catholic, nor does he campaign on a religious platform of any sort. That said abortion is hardly the only issue where the US gov't takes a pro murder stance - with one noteable difference. it IS basically the only issue where the murder is currently protected as a "right" by the federal supreme court in Roe VS Wade. The US's aggressive policies in global politics for example sponser murder but are technically not even legal as congress has the sole right of declaring war.
All legislation at the federal level is a sham since A: most politicians don't read bills, won't speak out, won't enforce checks and balances etc and B: the entire system is dominated by the big moneyed interests of the global financial elite.....all high lvl politicians are clearly bought (paul being the exception)
That said most of his stances are not only more in tune with catholic doctrine - he is the only US candidate who can be considered a "reactionary" candidate. and could repeal much of the socialist harm done over the last few presidential cycles.
also note the president doesn't have the power to repeal abortion....the most any "conservative" will do is appoint maybe 1 or 2 "conservative" justices to the supreme court....Pauls answer is far more effective - take it out of the court in into the states.
even if Santorum actually cared about the issue of abortion his "stance" would remain that....never become action.
Marcadores