During his successful campaign for the White House, then-candidate Donald Trump won applause and support from the business community for his promise to substantially cut back on federal regulations. Many in the mortgage lending community had hopes the plan would include some relief from the mortgage regulations issued by the Consumer Financial Protection Bureau. Among other things, Trump said he would issue a temporary moratorium on “new agency regulations that are not compelled by Congress or public safety [and] cancel immediately all illegal and overreaching executive orders.” Richard Horn, who worked on the CFPB’s integrated-disclosure rulemaking known as TRID, said...