Answer
José Sócrates submitted his resignation as Prime Minister of Portugal on 23 March 2011. He had been Prime Minister since 2005, but his government had been struggling to deal with the country's economic crisis. In February 2011, the government announced a new austerity package, which included tax increases and spending cuts. This led to protests and demonstrations, and Sócrates's popularity plummeted. On 23 March, he announced his resignation.