Democracy Forward web site
https://democracyforward.org/
They accept donations:
Democracy Forward Foundation is a 501(c)(3) tax-exempt organization. Gifts to Democracy Forward Foundation are fully tax-deductible. No goods or services are provided in exchange for gifts.
Who are they (from the UK Guardian)
Progressive groups are preparing a concerted fightback against Donald Trump and Project 2025, the vast far-right policy plan, sponsored by the Heritage Foundation, which promises slashing reform to all areas of government when the president-elect returns to power next month.
Skye Perryman, chief executive of Democracy Forward, a national legal organization, will help lead that fightback via Democracy 2025, a new coalition of “litigation, advocacy and policy groups” designed “to deploy swift legal defenses” – an effort informed by, but meant to be stronger than, the scramble Trump prompted in 2017, the year Democracy Forward formed.
https://www.theguardian.com/us-news/2024/dec/28/skye-perryman-democracy-project-2025-trump