Same here. I put my email down when I was a democrat. I still get emails from them after unsubscribing many, many times.
The problem with unsubscribing is that distributing your email address isn't illegal, so they put you on a new list with a different name and - you didn't exactly unsubscribe from THAT list did you!
I actually had good success calling the office of the spammer in question and complaining to the person answering the phone. A young staffer with political ideals tends to pick up the phone and they empathize. They take my email address and seem to do something with it. I did this maybe 4 times over a span of a year and the chain reaction stopped.
The problem with unsubscribing is that distributing your email address isn't illegal, so they put you on a new list with a different name and - you didn't exactly unsubscribe from THAT list did you!