I am not a moral theologian. You may wish to ask your priest, or look to which party a pro life group would support.
Abortion is legal in all 50 states. On another thread, someone said that the US Surpeme Court does not legislate - to which my response, under my breath was “that’s nice”, as it is crystal clear that the Court did legislate with Roe and subsequent decisions.
Stare Decisis militates against a complete overturn of Roe; what is more likely is what is euphemistically called “death by a thousand cuts”, where more and more recognition is given to states trying to regulate abortion. The SC rarerly overturns a prior decision completely.
As to Canada, any law can be changed; laws are as immutable as the populace determines them to be.