Reports circulated earlier this week that Mick Mulvaney, interim head of the Consumer Financial Protection Bureau, was reviewing prior settlements the agency had made in enforcement actions.
Among them was a payout in the tens of millions of dollars regarding a practice in which Wells Fargo was charging borrowers fees to secure low mortgage rates. The practice reportedly affected more than 100,000 borrowers, and the bank has conceded that a "substantial number" of those customers were charged inappropriately.
But Trump asserted in a tweet that the CFPB will not be letting Wells Fargo off the hook and said the penalties actually could increase.
The development comes as Mulvaney has promised substantial changes at the bureau, which he once called a "joke." He has vowed to examine open cases under his predecessor, Richard Cordray, who resigned last month.
For its part, Wells Fargo has pledge to reimburse customers for any wrongful charges. The bank did not respond to a request for comment on Trump's tweet.