US Democratic vice presidential nominee and Senator from California, Kamala Harris (left) gestures toward US Vice President Mike Pence as she speaks during the vice presidential debate in Kingsbury Hall at the University of Utah in Salt Lake City, Utah, on Wednesday (See story on Page 3). Photo: AFP

Former US vice president Mike Pence and other conservative leaders are expected to attend a forum in Budapest from Thursday to discuss demographics and family values, cementing Hungary's reputation as a bastion of conservatism in the EU.

In power since 2010, nationalist Hungarian premier Viktor Orban has styled himself as an "illiberal" defender of "Christian Europe" who frequently clashes with Brussels over his anti-migration and anti-LGBTQ policies. First held in 2015, the so-called Budapest Demographic Summit takes place every two years to rail against migration and urge Christian couples to have more children.

Attending this week's two-day event - besides Pence and Orban - are the heads of state of the Czech Republic, Poland, Slovenia and Serbia, as well as far-right pundit Eric Zemmour, who is thought to be eyeing a run for the French presidency.

"I find that Viktor Orban has understood the evolution of the world... and defends the identity of his country and therefore that of Europe," Zemmour told CNews channel - derided by critics as a "French Fox News" - on Tuesday. At the last forum in 2019, Orban told international politicians, religious figures and diplomats that migration was contributing to "population displacement," using a loaded term used in extreme-right wing circles.

In earlier 2019, Orban announced a package of financial incentives to increase birth rates, including a lifetime tax break for women bearing four or more children.

Gabor Gyori of Budapest-based think tank Policy Solutions said Orban welcomed "with open arms" politicians and other influencers who were becoming increasingly right-wing and could "no longer find allies within the European conservative mainstream."

In August, conservative US television host Tucker Carlson - one of the Fox network's most popular commentators - broadcast a week from Hungary, lavishing praise on Orban.

In an interview with Carlson, Orban warned against "interference" in 2022's parliamentary elections, which are expected to be a tight race and could see his ouster.

"Obviously the international left will do everything that they can do, probably even more, to change the government here in Hungary," he said.

The 58-year-old Hungarian's anti-immigration policies, such as building border fences, also earned him praise from US ex-president Donald Trump who Orban called "a great friend of Hungary."