From must-read Adam Liptak exit interview with the outgoing SG:
The loss he most regrets, Mr. Verrilli said, was in 2013, in Shelby County v. Holder, which effectively struck down the heart of the Voting Rights Act of 1965.
“There are some powerful real-world consequences that followed very quickly from that decision,” he said. “It was an iconic statute and an important part of American history. That was a tough loss.”