Kathy Kraninger’s Credentials

The nominee can take long-term control over a rogue regulator.

Elizabeth Warren is threatening to block the confirmation of Kathy Kraninger to run the Consumer Financial Protection Bureau (CFPB), which amounts to an endorsement. The Massachusetts Senator is worried that Ms. Kraninger, who was nominated Monday by President Trump, will impose long-term discipline on the rogue agency. Excellent.

Ms. Kraninger would replace Mick Mulvaney, the White House budget director who has been moonlighting as acting CFPB chief since November. His writ was set to expire this week under the Federal Vacancies...