Asked about the former Senate Majority Leader's brutal response to his memoir, McClellan says:
"I am speaking up. I have had time to reflect and go back, and what I'm saying is sincere."
Also says, "I have a lot of respect for Sen. Dole."
Earlier: In extraordinary, scalding e-mail, Dole calls his fellow Republican "a miserable creature" who didn't "have the guts to speak up."
Plus: McClellan says he apologized Thursday to author Richard Clarke, who he criticized as press secretary when he released his own memoir.
