Um, yes he has. I simply cannot read this statement as anything other than support of the protestors (see Breaking News sidebar: RECENT DEMONSTRATIONS IN IRAN):
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The United States views with great concern the use of violence against Iranian students peacefully expressing their political views. We are alarmed at reports of arrests and provocative actions taken against students by regime forces, and call upon the regime to protect the human rights of the students and to release those who have been arrested.
Iranians, like all people, have a right to determine their own destiny, and the United States supports their aspirations to live in freedom. It is our hope that the voice of the Iranian people and their aspirations for democracy and the rule of law will be heard.