This just came over Reuters two minutes ago [excerpting]
MEXICO CITY, Dec 1 (Reuters) - Felipe Calderon took over as
Mexico's president on Friday and pleaded for an end to months
of unrest over his narrow election win, but a huge brawl
erupted in Congress where leftists vowed to block him from
taking the formal oath of office.
Dozens of rival lawmakers threw punches and chairs at each
other and leftists built barricades of chairs to block the main
doors and prevent Calderon from entering the building.
{snip}
FIST FIGHTS
Conservative and leftist lawmakers attacked each other in
an ugly brawl in Congress earlier this week, and fighting broke
out again on Friday morning.
"Calderon is not coming in here, we are going to stop him,"
said deputy Adriana Diaz. "He is not coming in the front
entrance. Thieves come in through the back door."