>>9943880 (PB)
Mary Stein is very prominent behind the scenes in funding of leftist causes.
As President of the Moriah Fund, she directs about $8 million in grants to a number of "grassroots" organizations that are politically active.
That doesn't seem like a lot, but the frequency and constancy of the support to small organizations and candidates has a cumulative effect over decades.
https://www.influencewatch.org/non-profit/moriah-fund/
https://capitalresearch.org/article/inconspicuous-nonprofit-funds-leftist-anti-israel-agenda/