the government failed to comply with § 20703
A second, independent reason for the result. Even setting aside whether the voter file is covered at all, Title III's § 20703 lets the Attorney General compel records only by a written demand that contains “a statement of the basis and purpose” for the request. The court reads that to require both a basis and a purpose in a single demand, and finds none of DOJ's three letters supplied both: the earlier letters stated a basis but no Title III purpose, while the August 14 letter stated a purpose but no basis. Because the requirement is mandatory, the court holds Michigan did not violate Title III by refusing to produce the file. (The dissent reads the letters together as composing one adequate demand.) This procedural holding could recur in DOJ's other pending voter-roll suits.