La Paz has spent a month under blockade. The main roads into Bolivia's administrative capital have been cut for four weeks, and shortages of food and fuel worsen by the day. Frustration is mounting among residents: some demand the resignation of President Rodrigo Paz for failing to keep his campaign promises, while others call for a firm hand and the deployment of the army to lift the siege. Most agree that the president, who took office less than seven months ago, should have acted sooner, when