CNBC: “Federal law requires super PACs and political committees to report large independent expenditures within 24 or 48 hours depending on how close to Election Day the spending occurs, showing how much they spent and which candidates they supported or opposed. Their donors, however, are disclosed less frequently through periodic campaign finance reports.”“And in 2026, the practice of creating new, last-minute PACs has exploded. Both parties are using the tactic, with Republican-linked PACs spending about twice what those connected with Democrats have disbursed.”