“Population control” motives and population control backers are behind proposed curbs on legal immigration being mooted in the Senate this week.

That is according to a memo being circulated among senators as this week’s debate over immigration policy plays out.

The memo, a copy of which RedState has exclusively obtained, was issued against the backdrop of negotiations over conditions to be imposed in exchange for congressional action to legalize the estimated 800,000 recipients of the Deferred Action on Childhood Arrivals program instituted by former President Obama and rescinded last year by President Trump.

It targets the Federation for American Immigration Reform (FAIR), NumbersUSA and the Center for Immigration Studies (CIS) as “founded and funded by avowed eugenicist, Zero Population Growth and sterilization proponent John Tanton” and “the Colcom Foundation, whose founder, Cordelia Scaife May, the late oil heiress, left more than $400M to her foundation to promote population control measures.”

The memo also claims the named groups have ties to the eugenics movement, and highlights statements of support by key leaders of the groups for concepts like “voluntary infanticide” and forced sterilization. It also points to ongoing disagreements and hostility between the groups and pro-life leaders, especially Catholics.

The memo was issued by pro-immigration advocacy group FWD.us, which may raise questions among some conservatives about the basis for the claims it makes. However, unlike some other memos and documents circulating on Capitol Hill as part of the immigration debate, the memo obtained by RedState contains extensive sourcing, much of which at first glance checks out. This may make some of its more eyebrow-raising claims harder to ignore, despite the identity of the issuing organization and it’s perception as left-leaning (FWD.us was founded by Facebook titan Mark Zuckerberg).

Likely because of FWD.us’ left-leaning affiliation, the memo avoids taking shots at FAIR, NumbersUSA and CIS personnel’s apparent ties to organizations like Planned Parenthood and the pro-abortion Guttmacher Institute. The memo does, however, also allege ties between personnel at these groups and white nationalist organizations and figures, in some cases more plausibly than others.

The memo may carry more weight with socially conservative, evangelical senators than pro-choice moderates or more Trumpite figures, given its focus on topics of interest to family values advocates.

It may also have the effect of upsetting some Democrats, who retain favorable views of the Zero Population Growth movement and Scaife May, who was reportedly personally close to Planned Parenthood founder and eugenics proponent Margaret Sanger and a fan of her work. However, with Republicans in control of Congress and the White House, any such concern appears to have been pushed to the back burner with the release of the memo.

You can read the memo here.