Trump administration bank regulators moved Friday to close what one nonprofit consulting firm has advertised as the “CRA Goldmine,” curbing the ability of left-wing advocacy groups to use an anti-redlining law to pressure banks for donations. Community organizations can challenge a bank’s record under the Community Reinvestment Act when it seeks approval for a merger, acquisition or new branch. The prospect of a poor CRA grade, which can delay or derail those plans, has given activist groups leverage to press banks for grants and other financial commitments. Bridge Philanthropic Consulting, which advises nonprofit organizations on fundraising, has promoted the system...