Request a refund of all the contributions you made to the DNC. Their bylaws require them to refund donations made within a certain time limit if requested. Send a polite and concise email to DNCMemberServices@dnc.org You do not need to itemize or remember when or how much you donated. All you need to give them is your name and address. They will look up your info in their database and get back to you right away (within 1-2 days).