Media
Voter Fraud and Intimidation in Philadelphia and elsewhere
A couple of good resources exposing (and seeking citizen journalists) on voter fraud and intimidation are Voter Fraud Squad and Election Journal. The latter has video of two Black Panthers, one with a night stick, outside a polling place in Philadelphia.
Amanda Carpenter has more on the Black Panther story and on the story of GOP poll watchers being tossed out of polling places. The latter is currently being investigated.