I think the goal is less to target racial groups directly, but rather to target those who are less likely to have the desire, the knowledge, or the resources to

I think the goal is less to target racial groups directly, but rather to target those who are less likely to have the desire, the knowledge, or the resources to rectify the issue. This tends to target the poorest Americans -- either those who can't afford to take time away from work to get the documents required to re-register or those who simply would give up after finding out they are not registered.