The court was widely expected to confirm the center-right candidate Calderon defeated leftist former Mexico Mayor Andres Manuel Lopez Obrador by a slim margin, El Universal reported Tuesday.
Obrador, however, has contested the results, leading several days of protests in the capital against the results alleging widespread fraud, and promised to create a parallel government.
Last week federal deputies shouted their opposition to the election results during a state of the union address by President Vicente Fox, forcing him to to halt his speech.
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