its not any one factor lets run the list of the ways Democrats and Rinos benefit from open borders / sanctuary cities : 1) LOBBYING MONEY from the charities & NGOs that provide big govt contracts to process / service welfare recipients. That, I believe, is the primary one 2) supply side infrastructure for the Pedomafia 3) a cut of the DRUG RUNNING that accompanies Human Trafficking 4) a cut of the GUN RUNNING that accompanies Human Trafficking 5) Welfare dependents inclination to vote for the high welfare party  6) Benevolent optics from the corrupt as fuck MSM  anyone want to add?