In a bit of political drama that made the US 2000 Presidential Election [wiki] look like a neighborhood misunderstanding, Felipe Calderón [wiki] of the right-of-center National Action Party took oath as the President of Mexico amidst jeers and protests:
Felipe Calderon took the oath of office as Mexico's president in a lightning-fast ceremony Friday before Congress that was preceded by a brawl between lawmakers divided over the tight presidential election.
Calderon entered through a back door and appeared suddenly on the speaker's platform, which was the site of three days of fistfights and sit-ins by lawmakers seeking to control the stage.
Yes, that's right: fistfight and chair-throwing rampage [YouTube] in the Mexican Congress.
Here's one more clip of the fistfight [Google Video]
Not one to let bygones be bygones, Calderón opponent, Andrés Manuel López Obrador [wiki] of the Party of the Democratic Revolution declared himself president!
At least they didn't hold a food fight, à la the Taiwan Parliament in 2004!