A key moment early in the debate.
Hillary attacks Obama for being inconsistent on health cared. Obama says he hasn't been. They go back and forth. Then Edwards gets a chance. He says -- he disagress on some policy questions with Obama, but they are both agents of change.
"Both of us are powerful voices for change. Anytime you speak out powerfully for change, the forces of the status quo attack." And: "I didn't hear these kind of attacks from Sen. Clinton when she was ahead. Now that she's not, we hear them."
Hillary responds furiously. She says she has been an agent of change her entire life! "I want to make change, but I've already made change! I'm running on a record of 35 years of change."
But: It seems like Edwards has tilted the debate.