So the current debate is whether or not Obama should "get tough" with Iran. I'm not a fan of sabre-rattling for the sake of appearances, and I doubt making threatening statements toward the Iranian regime is going to help the protesters in any practical way. Daniel Larison of the "American Conservative" makes the most compelling argument I've read for why the President should just keep his trap shut. Read the editorial here.
To his credit, Obama has, so far, limited his statements to generic condemnations of violence directed against protesters and his "concern" over the election results.