They want to move the needle towards more Democratic voters, whether they come from prisons, drug clinics, third world shitholes, nuthouses or nurseries. The tally is the only issue they care about.
Hit the nail on the head there, Dead. They also tap geriatric alzheimers patients and group homes for the mentally disabled to vote Dem by either filling our their ballot for them (I've personally seen this in my family) or getting them to vote multiple times by bussing them around to different precincts.