Leaving abortion to the states makes them agents of oppression

But we are now past the point of accommodation; there is simply no give on the side of those who believe that life begins at conception and that abortion, therefore, is tantamount to murder. If there were a moment, before Roe, that the country could have come together, state by state, to hash out reasonable abortion restrictions, it has long passed. The issue is too divisive, the antiabortion forces too activated, to settle for half measures if total victory is achievable.

Source: WP