Trump Poses Headaches for Supervisors in U.S., Europe, Wall Street Journal

But if rules in Europe and the U.S. vary too much, this will create more work for those policing banking activities. Such a situation would mean “there will be so much more pressure on the regulators to supervise the banks and examine them more carefully,” said Mayra Rodriguez Valladares, a New York-based financial-regulation consultant.

More work for supervisors raises the risks of errors, barring an increase in resources for those watching the banks, she cautioned: “And then you’re surprised when they miss something.”