Russia will consider exchanging prisoners from Ukraine’s Azov battalion for Viktor Medvedchuk, a wealthy Ukrainian businessman close to President Vladimir Putin, a Russian negotiator said on Saturday. “We are going to study the possibility,” said Leonid Slutsky, a senior member of Russia’s negotiating team on Ukraine, speaking from the separatist city of Donetsk in southeastern Ukraine, the RIA Novosti news agency reported. Medvedchuk, 67, is a politician and one of Ukraine’s richest people and is known for his close ties to Putin. He escaped from house arrest after Russia’s brutal invasion of…