We're talking a summer intern in 1971, right? As I understand things, she worked primarily with Burnstein.
http://www.politifact.com/truth-o-meter/statements/2008/feb/15/chain-email/shes-no-red/
In her book, Clinton makes only passing reference to her responsibilities at the firm, stating, "I spent most of my time working for Mal Burnstein researching, writing legal motions and briefs for a child custody case."
Burnstein, who was never a communist, is retired now. Reached at his home in California, Burnstein recalled that Clinton was one of the firm's better summer interns: smart and a hard worker.
"She wasn't political at all, that I remember," Burnstein said.
...
Burnstein couldn't recall what specific cases Clinton worked on, but at the time, he said, he had cases where landlords refused to rent to black people, and one in which a group of doctors took umbrage with being asked to sign a "loyalty oath" attesting that they were not communists. But they also did a lot of landlord-tenant, workers' comp, family law and personal injury cases.
"We did poor people's law," Burnstein said.
So why hasn't Clinton talked much about it?
"I think you can figure out why," Burnstein said.
http://www.politifact.com/truth-o-meter/statements/2008/feb/15/chain-email/shes-no-red/