When drivers enter a new state in the U.S., they’re often met with a cheerful "Welcome to…" sign, a longstanding gesture symbolizing hospitality and openness. However, for undocumented immigrants carrying certain types of out-of-state driver's licenses, the message is becoming increasingly unwelcoming. A growing number of Republican-led states are now invalidating driver’s licenses issued to undocumented immigrants by other states, reflecting a widening divide