I'm not sure those are the only choices. The purpose for which our republic exists is to secure and protect the rights given directly to us from God. It is in no way to be considered a secular state because a denial of God relegates our God give rights to privileges given us by government and subject to their modification or withholding.
When our government or any government no longer serves God it forfeits its authority to act and to exist. This was made very clear in the Declaration of Independence.
You are right that we cannot expect to change things overnight, but that is no justification for inaction or indifference. However, if all Christians voted their faith, including the millions of Catholics who have forgotten the hierarchy of Truths, things would change overnight.
The purpose of my rant on abortion in this thread was a call to action for Christians of all denominations to recognize those beliefs we share and act in a united manner to confront the evils in our society. We are all sinners when we allow fights over the doctrinal differences between us to divert our attention away from the really important issues and our obligations as Christians.
I doubt you’ll find to many people on this forum, of any denomination, that supports abortion.
But if a particular churches doctrines are impeding the reform of these laws then those doctrines are fair game for examination.