Cosmopolitan elites will also like how Basic Income helps prevent the proletariat from revolting without too many invasive policy solutions. Urban poor will like Basic Income because it will increase their incomes, and also frees them from demeaning parochial meddling of administrators telling them how they can and cannot spend their money (i.e., food stamps).
To be sure, many Democrats will oppose Basic Income. They will argue that it will dismantle parts of the social welfare state (which it will). These Social Democrats will be wary that Basic Income will replace various safety nets. But with big business and urban elites in favor of the idea, there’s a good chance the Democratic Party will come to embrace Basic Income.