The European Union needs to rethink its support for Ukraine following Donald Trump's U.S. election victory, Hungarian Prime Minister Viktor Orban said before a summit of EU leaders on Friday, adding that Europe cannot finance the war alone.

Ukraine has historically depended on foreign humanitarian and military aid to resist Russia's two-year invasion, with the U.S. and the EU providing the lion's share of this assistance.

The re-election of Donald Trump to the White House is focusing minds in Europe, and with dozens of leaders meeting in Budapest, they have the perfect chance to talk it through.Trump's first term in office saw a dramatic souring of relations.