Republicans on Capitol Hill might be laying the groundwork for legislation that could scale back the application of the disparate impact theory of legal liability in mortgage lending. Currently, there is no active legislation to that effect pending in the U.S. House of Representatives or the Senate, and industry lobbyists said there is no such interest underfoot. But just the fact that the House Financial Services Subcommittee on Oversight and Investigations held a hearing this week on disparate impact in general had some Democrat supporters of the theory a bit anxious. “My hope is...