In appointing Mr. Giancarlo to run the Commodity Futures Trading Commission, which regulates the sort of derivatives tradingbr that spread panic on Wall Street in 2008, the president took another step toward challenging the Obama administration’s legacy on financial regulation.br Trump Picks a Regulator Who Could Help Reshape Dodd-Frank Act -br By BEN PROTESSMARCH 14, 2017br President Trump rounded out his financial regulatory team on Tuesday, announcing plans to select J. Christopherbr Giancarlo to oversee a lucrative corner of Wall Street that helped unleash the financial crisis.br The order directed the Treasury Department to identify whether existing regulations align with thebr new administration’s goals, including fostering “economic growth and vibrant financial markets.”br While the president cannot unwind Dodd-Frank with the stroke of a pen,br and while Senate Republicans most likely lack the votes to pass a sweeping overhaul of the law, regulators like Mr. Giancarlo could move to ease some of its rules.