The premise here is flawed. One would be hard pressed to produce any attorney general who can honestly make such a claim. Of course, the abortionists aren't concerned with all of the laws, merely those pertaining to abortion. This presents a major problem. To use any single issue, especially one that really is of little concern to the daily lives of most Americans, as a litmus test for political office creates an inherently hostile political atmosphere.
Partisanship is one thing.
Debating difficult questions is the essence of self-government. Take those tactics up a couple of notches, and you have full-blown fascism. Abortion is one issue where this problem is aptly demonstrated. Even if you're a liberal Democrat, that has to disturb you. When this type of voting is practiced on a large scale, you end up with national candidates who seek to consolidate interest groups rather then lay out a comprehensive vision for government.