[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2009/images/06/17/intv.sadjadpour.art.jpg caption="Karim Sadjadpour tells CNN's John Roberts that Iran's supreme leader may be faced with a dilemma to sacrifice himself or President Ahmadinejad."] Pressured by a fourth day of street protests, Iran is clamping down. Reporters have been confined to their rooms and they're jamming phones and radio transmissions in Iran. Karim Sadjadpour … Continue reading Expert: Iran's supreme leader could oust Ahmadinejad