This is a stunning reversal. He just endorsed the results twice and called them a "divine assessment." Now, he is reacting to the massive evidence of fraud, and may have realized his coup isn't working and he needs to back off:

State television quoted Ayatollah Ali Khamenei directing a high-level clerical panel, the Guardian Council, to look into charges by pro-reform candidate Mir Hossein Mousavi, who has said he is the rightful winner of Friday's presidential election.The decision comes after Mousavi wrote a letter appealing to the Guardian Council and met Sunday with Khamenei, who holds almost limitless power over Iranian affairs. Such an election probe by the 12-member council is uncharted territory and it not immediately clear how it would proceed or how long it would take.

What we're seeing is the power of resistance.

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