Washington

THE Obama administration has proposed sweeping changes to our financial regulatory system. I am an active supporter of the key pillars of reform, including the creation of a consumer financial protection agency and the administration’s plan to consolidate the supervision of federally chartered financial institutions in a new national bank supervisor. This consolidation would improve the efficiency of federally chartered institutions while not undercutting our dual system of state and federally chartered banks.

But some are advocating even more drastic changes, like the creation of a single regulator for all banks (and bank holding companies). We clearly need to streamline the system, but a single regulator is not the solution. Calls for consolidation...