Ahh.Some don't like Democrats no matter what and will say anything and everything against them for stopping people from building factories in residential areas, for caring for the poor, for acting to preserve lives, anything that protects the majority against the willful and "I don't give a **** what this does to you" contingent.
Over here the term used is “one eyed supporter.”
It’s slang meaning someone who will only see the faults of the opponent and the best in their team. And constantly point each out.
Granted it’s used more for drunk sports fans, but it’s been (sarcastically) used for political supporters as well