One of the most vocal advocates for the United Kingdom’s vote to leave the European Union will campaign with Republican Rep. Lou Barletta in Pennsylvania.

Nigel Farage, who was head of the U.K. Independence Party, was one of the most vocal advocates for Brexit and is a major supporter of President Donald Trump.

Farage will campaign with Barletta, who is challenging Democratic incumbent Bob Casey for the Senate, in Harveys Lake, Pennsylvania, in a private fundraiser, the Citizens’ Voice newspaper in Wilkes-Barre reported.

Barletta spokesman David Jackson said Farage is a friend of one of the hosts of the fundraiser, which will take place at a private residence on July 20.

“Congressman Barletta is fortunate to have supporters all over Pennsylvania who are willing to host events for his U.S. Senate campaign,” Jackson said. “Congressman Barletta has not met Mr. Farage, nor has Mr. Farage donated to the campaign because, as a British citizen, he cannot.”