Gnu Re Factions-

It is very easy to figure out from the detailed vote breakdowns compared against detailed demographics. Individual ballots are secret, but put together by voting precinct and district, the story is there, and this information is on record.

Donations are public, so if one has contributed to a candidate, the name of the candidate, the name of the donor, the amount, zipcode, street address all appear on maps that one can search.

For an example, I set Albuquerque, postal code 87124, to see the pattern there. 46 people donated $20823 to Republican candidates. 123 people gave $124,974 to Democrats (mostly Hillary and Bill Richardson).
A few of the donors in the code area-
Don Chalmers, (auto dealer)- $12500 to DNC
Celina Sandoval (homemaker)- $2300 to Hillary
Robert Sandoval (Atty.)- $2300 to Bill Richardson
James Jimenez- $2300 to Bill Richardson (The occupations are all there, but I won't cite them)
Dave Patterson- $1100 to Republican NC
Etc. Occupations and usu. the institution worked for are all there.

Examples at the other end-
Cizan Patsy, (homemaker)- $3 to G. W. Bush
Victor Read, (retired)- $60 to RNC

See fundrace; http://fundrace.huffingtonpost.com/neighbors.php
This site was pointed out in another thread, but I've forgotten which.
The sites on which this Huffington Post synthesis is based can be determined through Google, but it takes effort.