During the "yes or no" question on support for driver's licenses for illegal immigrants, Obama stumbles further, giving a "Clintonesque" answer before saying, when pressed, "yes."

The rest of the responses: Biden - no; Clinton - no; Edwards - no; Dodd - no.

Dennis Kucinich has the best answer, telling Blitzer: "I take issue with your description of people being illegal immigratns....they're undocumented." There are no illegal human beings. "I take exception to the way you framed that question," he tells Blitzer.

And then Bill Richardon tells me something I didn't know: He's already signed legislation giving undocumented immigrants licenses. "My answer is yes," he says. "I did it four years ago." His legislature sent him and bill and he signed it.

This is why it's important for the moderators to spread the questions out, instead of focusing their fire on one candidate -- so the viewers can learn something and hear different perspectives.

--Garance Franke-Ruta