Tusk wrote on social media that it was "very likely that from Sunday we will have a Warsaw in Budapest" – a reference to Jarosław Kaczyński's 2011 promise to replicate Orbán's model of governance in Poland.
Hungarians will vote on Sunday in what analysts say could be Prime Minister Viktor Orbán’s toughest election in sixteen years.
Most independent polls put the opposition Tisza party, led by Péter Magyar, at between 49 and 58 percent support among decided voters, compared to 35 to 38 percent for Orbán's Fidesz.
Government-affiliated pollsters, however, show Fidesz ahead by several percentage points.
In a video posted on Facebook on Friday, Hungary's PM accused the opposition of "conspiring with foreign intelligence services" in what he called an organised attempt to undermine the result.
Orbán also condemned alleged threats against his supporters, "fabricated accusations of electoral fraud" and plans to hold demonstrations before votes are counted.
"We could lose everything we have built together," he said.
Foreign Minister Péter Szijjártó claimed that an opposition victory would mean all decisions being made "in the interest of Kyiv and Brussels", adding that keeping Hungary out of the war in Ukraine was the key issue at stake.
Over his sixteen years in office, Orbán has shifted markedly from his origins as a centre-right member of the European People's Party, embracing an increasingly nationalist and anti-immigration platform while growing closer to Moscow and more distant from Brussels.
(ał)
Source: PAP, IAR