Votes sent by mail from overseas were still being counted and could slightly alter the current result, but the sweeping victory of Orban, Fidesz, and its small ally, the Christian Democratic party, was not in question.
His Fidesz party won a two-thirds majority for the third time straight time in Sunday's election, meaning he has the powers to change constitutional laws.
BUDAPEST, April 10 (Reuters) - Hungarian Prime Minister Viktor Orban said on Tuesday his landslide re-election had given him a powerful mandate to restrict migrant rights and seek a European Union of independent nations rather than a "United States of Europe".
Polish Prime Minister Mateusz Morawiecki wished Orban success on Monday.
"We know by name who they are and how they work to transform Hungary into an immigrant country".
But the "Stop Soros" package promises to go much further, aping similar laws in Russian Federation, slapping taxes on foreign-funded non-governmental organisations that "support" illegal immigration.
NGOs and liberal civic organisations now fear a further crackdown if the government, as seems likely, passes a new tranche of laws known to many as the "Stop Soros" package, that has already been tabled in parliament.
The government has been accused of using anti-Semitic tropes in its relentless campaign against Soros, who is Jewish.
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The right-wing nationalist Jobbik party placed second with 26 seats, while a Socialist-led, left-wing coalition came in third with 20 seats.
Foreigners deemed to support asylum seekers could be barred from entering Hungary, NGOs staff face being barred from approaching border areas and organisations will undergo "security tests".
Orban is an avowed Eurosceptic who opposes further European Union integration.
Horst Seehofer said he would congratulate Orban on behalf of his Christian Social Union party.
Hungary should thus serve as an important lesson for other European countries: growing inequality and social tension may undermine the foundations of democracy and spark a revolt against the elite, enabling the rise of antiestablishment (and, in the Hungarian case, antidemocratic) forces that promise to do away with the status quo.
His critics say Orban has put Hungary on an increasingly authoritarian path and his stance on immigration has fuelled xenophobia in the Central European country.
French far-right leader Marine Le Pen and her Dutch counterpart Geert Wilders were quick to tweet their congratulations once results became clear.
"You can't think about Europe's future without remembering Viktor Orban, without remembering Hungary, Fidesz", he said on Friday. "They planted hatred in people's heart, which is very sad", said Balazs Bansagi, 45, a quality controller.