As to politics, Christ made it clear that we are to give the government what it is due, but we are to give God what He is due (and what God is due is for the good of all). Considering we are selfish by nature, if we have to make a choice to choose either what we think is best or what other people think is best, verses what God has revealed is best, then we would all do well to stick with what God revealed is best, if for some reason that hasn't already proved to be crystal clear.
Christ was crucified under Pontius Pilate, a coward, who knew Christ was innocent and yet allowed Christ to be crucified. Pontius Pilate represents those who don't have the courage to stand up for what is right and to be fair in determining what happens to the innocent. This sounds all too familiar with "pro-choice" (pro-abortion). To vote "pro-choice" is to either be a coward, or selfish; there is a lack of concern, love and care for the victim (the unborn child), and of course, a total lack of trust in Divine Providence. We then think it will benefit someone if we, instead, "play God," and support the murder of the most innocent being in creation without cause; just like Pilate did to Christ. We all know we have free will, and I do respect the free will of others as a gift from God, but it would help many if we vote wisely, instead of selfishly and/or cowardly:
"In truth I tell you, in so far as you neglected to do this to one of the least of these, you neglected to do it to me."-Matthew 25
It is impossible for us to recognize that Pontius Pilate was to Christ (innocent party), what we are/could be to the unborn (the modern day, most innocent party) without God revealing it to us, through the Church. Pilate, too, "personally" did not want to allow Christ to be killed, and yet, he allowed others to take control instead of standing up for what was right.
Someone summed it up best when she said:
"Pontius Pilate in the Gospels, who personally found no guilt in Jesus, but for fear of the crowd, washed his hands of the whole affair and handed Jesus over to be crucified, suggesting 'I'm personally opposed to crucifixion, but I don't want to impose my belief on others.' This is the same as the view of 'I am personally opposed to abortion/killing the most innocent being in creation, but I don't want to impose my belief on others.' " And thus like those of us who too don't personally agree with killing the unborn, when we allow others to take control and carry it out rather than be firm in standing by what our conscience tells us is right, we are no different than Pilate.
This is the kind of truth we can't come to using our own limited knowledge/intellect.
Thankfully, God has revealed time after time again that He is a God of infinite love and a God of infinite mercy: He reveals that our mistakes do not define us, so long as we repent, that is, so long as we turn back to Him and start anew. We need not look back on our mistakes, worrying whether God has forgiven us; He has made it clear that He will. We have no excuse not to love one another, especially the most vulnerable.
This is also why there is no room for condemnation in Catholicism; Catholics recognize that we are not to assume God's role in the judgment seat which belongs to Him alone. We are, instead, to grow in love and assist others in their personal growth.