Rancagua , the capital of O'Higgins Region , was also damaged Damaging , leading Causation President Sebastián Piñera to declare Expressing_publicly a catastrophe Catastrophe state in O'Higgins Region .

Student protestors have not achieved Achieve all their objectives , but they contributed Influence to a dramatic fall Cause_change_of_position_on_a_scale in Piñera 's approval rating , which was measured at 26–30 % in August 2011 polls by respected Chilean pollsters and had not increased Cause_change_of_position_on_a_scale by January 2012 .