The opposition alliance, which links Frepaso with the ancient, soft-left Radical party, called a debate in Congress.

ECONOMIST: Argentina

The SPD has ruled out forming an alliance with the radical Left Party at the federal level, limiting Mr Steinmeier's coalition options.

BBC: 'Merkel factor' could decide German vote

In Greece, the radical left party Syriza, which is highly critical of the austerity policies of the current coalition in Athens, may well be able to tap into the discontent with an economy which is shrinking for the sixth year in a row.

BBC: Europe and the anti-establishment vote

Mr Stratoulis, from the the radical-left party Syriza, said he was leaving a football match at the Olympic stadium when he was approached by the men.

BBC: Greek MP 'attacked by far-right Golden Dawn'

He says that Mexico's deep inequalities mean that the PRD cannot just be a moderate European centre-left party, but nor can it be so radical as to become a movement outside the country's institutions.

ECONOMIST: The left��s moderate radical

The new mayor of Milan, Giuliano Pisapia, was not the choice of Italy's biggest opposition group, the centre-left Democratic Party, but of the smaller and more radical Left, Ecology and Freedom movement, led by the governor of Puglia, Nichi Vendola.

ECONOMIST: Italy's beleaguered prime minister