Niskanen Center — funding-sources: Key donors include Open Philanthropy, Hewlett Foundation ($400K operations grant), Linden Trust for Conservation. The 501(c)(4) arm received funding from Open Society Foundations ($500K in 2017), Democracy Fund Voice ($175K in 2018).

NoteThe claim partially matches the source. Confirmed: Linden Trust for Conservation is listed as a donor; Open Society Foundations gave $500K in 2017 to the 501(c)(4) arm; Democracy Fund Voice gave $175K in 2018 to the 501(c)(4) arm. Partially confirmed: Hewlett Foundation did provide funding but the source shows multiple grants across 2017-2018 ($250K, $200K, $200K, $400K) rather than a single '$400K operations grant'—the $400K grant in 2018 was for 'general operating support' but this was one of multiple Hewlett grants. Open Philanthropy is mentioned but the $400K grant in 2018 was specifically for 'Immigration Policy Department,' not listed as a key general donor. The claim's framing of 'key donors' and specific grant descriptions is partially accurate but oversimplifies the funding picture.