U.S. Vice President ​J.D. Vance will travel to Hungary on Tuesday on a mission to boost the electoral campaign of the country’s nationalist Prime Minister ‌Viktor Orban, who faces the toughest re-election bid of his political career.

During the two-day visit, coming ​just days before the April 12 parliamentary elections, Mr. Vance will meet with Mr. Orban and attend a ⁠campaign rally with him, according to Hungarian government sources.

“I’m looking forward to seeing my good friend Viktor, and we’ll talk about any number of things related to the US-Hungary relationship,” Mr. Vance told reporters before departing Washington, adding relations with Europe and Ukraine will be ‌discussed.

The rare in-person gesture of support for Mr. Orban by a senior U.S. official is the latest example of President Donald Trump’s efforts to prop up like-minded right-wing leaders, including in Argentina and Japan.

Opinion ‌polls show Mr. Orban, who Mr. Trump has already publicly endorsed and praised as “a truly strong and powerful leader,” and ‌his ⁠Fidesz party face the most challenging election since returning to power in 2010. In most independent ⁠surveys, they trail the center-right Tisza party, led by Peter Magyar.