One reason the U.S. voting rate is so low is that each state -- and even some election districts -- has its own tangle of registration requirements and procedures. The discouraging maze keeps many citizens from voting. Thus the House in February passed a sweeping reform bill that would permit registration by mail and at various state agencies. Most significantly, anyone receiving or renewing a driver's license would be given a voter-registration form to sign.
Last week, though a majority of Senators were ready to approve the measure, Republicans mounted a filibuster. Concerned that most of the new votes would go...