"Your authority to govern the image-bearers of God under your jurisdiction is delegated to you by your Creator, the Triune God of Scripture. You are accountable to and will answer to His law. God detests the shedding of innocent blood and will avenge in this life or the next every drop of it that was shed by the laws you enacted or supported. Proverbs 6:16-17, "These six things the Lord hates, Yes, seven are an abomination to Him:  A proud look, A lying tongue, Hands that shed innocent blood..."
The fact is, we know more about the pre-born child than any other generation in human history. We know that from the moment of conception that it is a distinct and fully human life. We can see these pre-born children with ultrasounds. We can hear their heartbeats. We know that the unborn are human beings. Therefore, abortion is indeed murder. While we could argue about the propriety of the government distributing our mail, regulating and subsidizing certain businesses, etc. when it comes to your most basic function as a magistrate: You are called by God to protect the innocent from being murdered. That is your most basic function. Abortion is the ultimate exploitation of women in crisis. And abortion is the holocaust of unborn children. If you in any way endorse this great evil either by your silence or outright support, know for sure that you are dreadfully provoking your Creator. One day you will stand before Him and give an account of your actions. Do the right thing and make sure that tax dollars do not fund this wretched practice. And further, do everything you can to see that abortion is entirely and completely outlawed.