This is actually almost entirely public data. Yes, including addresses and phone numbers and political affiliation. There are some states that is not public as part of the voter file, but you can still get it other ways publicly. For example: USPS, etc. Some states/players would make you sign agreements not to use it for commercial purposes.
The modeling info included is not public.
Acquiring 50 state data can be a bit of a pain, but there are at least two major players that will sell it to you. (I remember one of them literally laughed when I told them we would want the databases without any personal info included, because we just wanted the address to various political precinct mapping.)