The Volcker Rule is emblematic of the latest Federal Reserve nominee’s challenge. Former Treasury Department official Randal Quarles is set to be the central bank’s first vice chair of supervision, a key role in President Donald Trump’s deregulatory push. But even where political consensus exists, like revising parts of the proprietary-trading ban, change requires support from fellow watchdogs. The Volcker Rule, part of the 2010 Dodd-Frank legislation, was hailed by supporters as a way to reduce risks at banks with federally guaranteed deposits by limiting their ability to trade with their own funds. It was slated to go into effect