A mass rally of supporters of defeated Mexican presidential candidate Andres Manuel Lopez Obrador has "elected" him head of a parallel government.
Hundreds of thousands of protesters gathered in Mexico City's main square, the Zocalo, for the show of hands.
Mr Lopez Obrador and his supporters have said his defeat by less than 1% of the vote was fraudulent.
However, the highest electoral court has backed the result, giving power to conservative candidate Felipe Calderon.
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