WHEN Colombian forces killed Alfonso Cano foakley sunglasses, the leader of the FARC guerrillas, Juan Manuel Santos, the president, hailed the operation as “the most resounding blow against the organisation in its entire history.” Yet The Economist's readers think the group still has plenty of life left: 80% of them said it would survive under new leadership.

This week's poll addresses Mexican politics. The leftist Party of the Democratic Revolution surprised many pundits by choosing Andrés Manuel López Obrador, the fiery orator who narrowly lost the 2006 presidential election, as its candidate instead of Marcelo Ebrard, the centrist mayor of Mexico City. Who do you think would have been a stronger candidate? Let us know.