Various anti-austerity campaign groups have added their voices to that of Portugal's largest trades union federation, the communist-linked CGTP, in calling for a demonstration outside the presidential palace on Saturday, to demand an end to the current right-of-centre government.
The CGTP has scheduled a demonstration for 3pm on Saturday to demand early elections, after the prime minister said in a statement to the nation that he was determined to carry on, despite the foreign minister and leader of the junior coalition partner tendering his resignation.
On Thursday, the anti-austerity movement 'Que se lixe a troika' - which was behind massive protests in September and March - and the labour-rights campaign Precários Inflexíveis are among the groups that are to join forces to call for early elections.
Portugal's president has the power to dissolve parliament, so long as he first consults his top advisors. In a statement, 'Que se lixe a troika' appealed for massive participation in the CGTP's rally and called for similar events to take place in other Portuguese towns, as on past occasions.
"In each city, the people must come onto the street to demand the end of this government and the end of the palace games that accentuate the degradation of democracy in our country," it said.
The events of recent days, with resignations and confusion, have shown that the government "is not in a position to govern, has no social or political support base, is disintegrating and that its internal struggles are now the only news that it produces."
The youth movement Plataforma 15 de Outubro, which has been staging daily protests this week, is also expected to take part in the Belém demonstration on Saturday.