A series of court orders in September appeared poised to force so-called dark-money groups — which raise and spend unlimited sums from anonymous donors — to reveal some of their funders for the first time.
But a month later, those donors are mostly still out of sight, and they could remain hidden as the dispute awaits a possible hearing at the Supreme Court.
A major disclosure deadline passed Monday with few political nonprofits unveiling any donors, even after a court threw out a...