Eric Holder

The case against Colorado's pot law

The case against Colorado's pot law

As surely as presidential candidates promise to change Washington, nominees for attorney general pledge to uphold the law, not personal policy preferences. Loretta Lynch, now the 83rd attorney general of the United States, was no different when she made her case to Congress in January. Trying to distinguish herself from her lightning rod of a predecessor, Eric H. Holder Jr., she said the law would be her "lodestar."

In the Supreme Court case Nebraska and Oklahoma vs. Colorado, Lynch has an early opportunity to prove that her statement was more than a confirmation hearing cliche.

Nebraska and Oklahoma claim that the federal Controlled Substances Act, or CSA,...