I made the mistake of donating to the Democratic Party a few years ago and have ever since received a huge amount of spam e-mail from candidates and party shill operations. It appears to me that they share e-mail lists. I have repeatedly tried to unsubscribe from their e-mail lists but nothing works. It appears to me that this is a despicable operation allegedly run by incompetent idiots that seem to lack ethical and moral standards. I recommend that you do NOT donate any money to any Democratic candidate and/or Democratic Party if giving them your e-mail is part of that process.
A second reason not to give to any political party is your donations are NOT tax deductible.