WASHINGTON — President Trump on Monday reiterated his intention to roll back Dodd-Frank financial regulations enacted to prevent another financial crisis, telling reporters that he soon planned to do “a big number” on the 2010 law.

During the 2016 campaign, Mr. Trump had pledged to “dismantle” Dodd-Frank, passed when Democrats controlled the White House and Congress, without specifying the actions he planned to take. He has not announced his timetable for carrying through on that pledge as president.

Mr. Trump’s pick for secretary of the Treasury, Stephen T. Mnuchin, a hedge fund manager, also has promised to “kill” parts of the law, including the so-called Volcker rule restricting banks from making certain kinds of speculative investments of the kind that led to the 2008-9 global economic crisis.