The Supreme Court's decision striking down a crucial part of the Voting Rights Act leaves hanging some of the most notable pro bono victories large law firms won last year, especially those that relied heavily on the "preclearance" mechanism of Section 5.

Lawyers from firms including Arnold & Porter; Dechert; Fried, Frank, Harris, Shriver & Jacobson; and Sullivan & Cromwell donated thousands of hours of time seeking to block newly passed laws in Pennsylvania, South Carolina, and Texas requiring voters to pre­sent photo ID at the polls.