The Justice Democrats PAC, the outside group best known for elevating the congressional Squad to power in 2018, has become the driving force behind this cycle’s slate of left-wing primary candidates. And powering the Justice Democrats this year is a dark-money machine operating out of a PostalAnnex in a strip mall near Anaheim, Calif: the Institute for Middle East Understanding, a fierce critic of Israeli policy, and its new political arm, the IMEU Policy Project.