Why is "Controversies of the 2006 Mexican general election" trending?

Wikipedia Overview

The Mexican general election of July 2, 2006, was the most hotly contested election in Mexican history and as such, the results were controversial. According to the Federal Electoral Institute (IFE), the initial "Quick Count" determined the race was too close to call, and when the "Official Count" was complete, Felipe Calderón of the right-of-center National Action Party (PAN) had won by a difference of 243,934 votes. The runner-up, Andrés Manuel López Obrador of the left-of-center Coalition for the Good of All, immediately challenged the results and led massive marches, protests, and acts of civil resistance in Mexico City. On August 9, while protests continued to expand, a partial recount was undertaken by election officials after being ordered to do so by the country's Federal Electoral Tribunal. The tribunal ordered the recount of the polling stations that were ruled to have evidence of irregularities, which were about nine percent of the total.