The party has concluded an electoral agreement with its centrist Radical Party and New Centre allies.
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But one big winner could be Tomislav Nikolic, the leader of Serbia's extreme-nationalist Radical Party.
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The Radical Party wants to turn the spotlight on euthanasia, therapeutic cloning and freedom of scientific research.
The opposition alliance, which links Frepaso with the ancient, soft-left Radical party, called a debate in Congress.
She was elected to parliament as a member of the anti-establishment, and at times absurdist, Radical Party.
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The Serbian Radical Party (SRS) is led by Vojislav Seselj, a war crimes suspect behind bars in The Hague.
To call more attention to the issue of free scientific research, the Radical party is running Luca Coscioni for parliament.
Women's groups and Italy's Radical Party have collected four million signatures to force the referendum on whether to ease the rules.
Added to that, Vojislav Seselj, the head of the ultra-nationalist Radical Party, has said he is withdrawing support from the government.
Tomislav Nikolic had recently persuaded his Serbian Radical Party to approve the ratification of an important agreement with the European Union.
Mr de la Rua's Radical party is the senior partner, the other being Frepaso, a collection of Peronist dissidents and former leftists.
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Worse still, the next day, Raul Alfonsin, a former president and head of the Radical Party, mused openly about a debt moratorium.
The Radical Party, lead by former European Union commissioner Emma Bonino, has already successfully campaigned to legalise abortion and divorce in Catholic Italy.
Mr Seselj was visiting the Bosnian Serb President, Nikola Poplasen, who is head of the Bosnian Serb wing of Mr Seselj's nationalist Radical Party.
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The ultra-nationalist Serbian Radical Party, whose leader is on trial at The Hague accused of war crimes, won most votes in Serbia's general election.
But the Radical party leader is Raul Alfonsin, a former president who is more critical of free-market policies than is Mr de la Rua.
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The Radical party, the non-Peronist pole of a two-party system since 1945, has all but disappeared: its official candidate won just 2% of the vote.
The wild card in all these calculations is the enduring strength of extreme Serb nationalism, embodied by Vojislav Seselj, leader of the Serbian Radical Party.
They cited, for example, Jose Genoud, the Senate's deputy president and a member of Mr de la Rua's Radical party, who has a staff of 60.
In Belgrade, meanwhile, Mr Milosevic conferred with Vojislav Seselj, his deputy prime minister and leader of the ultra-nationalist Radical Party, who bitterly opposed the peace terms.
The idea is that, with the constitution adopted, Serbia will hold an election before Kosovo goes, stopping the extremist Radical Party from picking up more disaffected votes.
Elisa Carrio, an ex-member of Mr de la Rua's Radical party, had hoped to use the election as a launch-pad for a populist bid for the presidency.
Indeed, as Mr de la Rua's government plumbs unparalleled levels of unpopularity, it is hard to find even candidates from his own Radical Party openly offering support.
The final week of negotiations saw moments of alarming drama, notably the election on May 8th of Tomislav Nikolic, leader of the extreme nationalist Radical Party, as parliamentary speaker.
The SNS was started in 2008 when Mr Nikolic and Aleksandar Vucic led their followers out of the extreme nationalist Radical Party, whose leader is also on trial for war crimes.
Other presidential candidate names mentioned by members of parliament in interviews with the Italian press include Monti and respected Radical Party leader and former European Union Member of Parliament Emma Bonino.
By contrast, the party that might hope to gain from Mr Milosevic's death is the nationalist Serbian Radical Party, which although it is not in government is already the strongest in parliament.
The biggest losers in May's elections were the ultra-nationalist Radical Party -- whose party president Vojislav Seselj is currently himself on trial for war crimes at The Hague -- and former prime minister Vojislav Kostunica's Democratic Party of Serbia.
Serbian Radical Party, are insanely nationalist.
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The bidders for power in Belgrade include the Socialists, formerly led by Mr Milosevic, and the Serbian Radical Party, which did well in December's general election: its founder, Vojislav Seselj, is so extreme that before surrendering to The Hague he called the Socialists too soft.
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