Erick Erickson at Redstate claims to have a copy of Elena Kagan’s Phd thesis. “To The Final Conflict: Socialism In New York City, 1900-1933.” He says:
This proves Elena Kagan is an open and avowed socialist. The woman declares that socialists must stick together instead of fracture in order to advance a socialist agenda, which Kagan advocates.
But then, he says Princeton forced him to not put the PDF on his site.
But the Huffington Post has excerpts. Where Kagan says this:
…If the history of Local New York shows anything, it is that American radicals cannot afford to become their own worst enemies. In unity lies their only hope.