Hungarian Prime Minister Viktor Orbán has U.S. President Donald Trump’s “complete and total support” — but is on course to lose the country’s elections, which are shaping up to be one of the most important and contentious in Europe this year.

On Tuesday, U.S. Vice President JD Vance will touch down in Hungary to offer Orbán his support and address an election rally at a soccer stadium in Budapest ahead of Sunday’s elections. While other European leaders have aligned themselves unambiguously with Ukraine in its war against Russia, Orbán has maintained comparatively close ties to Russian President Vladimir Putin. He even said on the campaign trail that the EU was a greater threat to Hungary than Russia.

The latest polls show Orbán and his Fidesz party are set to lose to their main challenger, the pro-European opposition party Tisza, with its leader, Peter Magyar, on course to replace Orbán after 16 years in power.

It would be a significant change in a country where discussions are dominated by concerns over migration, vulnerability to higher energy prices, corruption and breaches of the rule of law.

Those breaches have led the European Commission to suspend EU funds for the country — roughly 17 billion euros worth of funds are still frozen.