I'm actually volunteering all next week. But that's beside the point.
You say we can't determine when life begins. We have determined it. W know that this fetus is a human fetus. OBviously it's rediculous to say otherwise. We know it is alive, it has a heartbeat, brain waves, and many other signs of life. We also know that this living human child, is an individual. Abortion supporters used to claim the fetus is part of the woman's body, but now scientists have found otherwise.
(Theres actually a cool system that goes on, since normally the mother has systems in place to essentially kill any flesh in her body that isn't hers, but there is another system that has recently been found that protects the child from these flesh killers.)
The question isn't whether it is alive or not. Or whether it is human or not.
I have heard the strongest argument claiming abortion MIGHT not be murder, from a Christian. The question is: when does the baby receive a soul. That's the ONLY thing in question at this point, and it will likely not be answered. (At least not anytime soon) When you say it isn't human, I think this is what you must mean. The only thing that would cause me to think that abortion should be allowed is if it were proven that the soul came after. Until then, I'm going to err on the side of life.
I have heard so many arguments for abortion, and each time it seems like the word soul just isn't in the debaters vocabulary. They say it isn't human, or we don't know if it's alive, when at times it's clear that isn't what they mean to say.
Of course almost no democrat will likely say this, as they don't believe in souls. They simply have to work around the word and try their best to describe why abortion is ok without 'soul'.