When I lived in RI, they cater too Illegals w/ aid and I believe Drivers Licenses, but they may have happened after I left.
The economics were simple. The state had maybe 900K people and everybody was leaving to find work elsewhere after 2008. Illegals buy things and drive, so the revenue from Sales Tax and Gas Tax was significant, so you encourage them to immigrate to your state. Being a Blue State meant that there was no political down side, as Limo Liberals would say we need to help the poor dears.