On the Facebook page of the Coffee Party was an item "Ask every candidate running for office: who are your corporate sponsors?"
When I looked at the item 1,076 people liked the item and 113 commented. One of the comments was where do you find this as public information. Open Secrets is one web site that tracks this information from the Federal Elections Commission.
For example, Pres. Obama's campaign has raised over $89 million and 71% is from individual contributors. His one associated outside group is the Super PAC Priorities USA Action. The biggest contributor to that is Jeffrey Katzenberg, CEO of Dreamworks Animation, at two million, the next two are at $500,000 each, and then the others' contributions diminish quickly to $500, one of these being an executive of Solyndra.
On the other hand, Ron Paul has raised less than $13 million with 96% from individual contributors. He has two outside groups associated with his campaign: The Super PAC Revolution PAC and Nevadans for Liberty. The latter has spent $1,553 campaigning against Democrats. According to the former's website, it has raised over $125,000 and boldly states "No contribution limits!"
I think I may look a bit more into Americans Elect. I do have to check on their financing:) And if that doesn't work, I can always vote for Wright In. But who should his running mate be?