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Article snippet: Oleg V. Deripaska, a Russian oligarch once close to President Trump’s former campaign manager, has offered to cooperate with congressional committees investigating Russian meddling in the 2016 election, but lawmakers are unwilling to accept his conditions, according to congressional officials. Mr. Deripaska’s offer comes amid increased attention to his ties to Paul Manafort, who is one of several Trump associates under F.B.I. scrutiny for possible collusion with Russia during the presidential campaign. The two men did business together in the mid-2000s, when Mr. Manafort, a Republican operative, was also providing campaign advice to Kremlin-backed politicians in Ukraine. Their relationship subsequently soured and devolved into a lawsuit. Mr. Deripaska, an aluminum magnate who is a member of the inner circle of the Russian president, Vladimir V. Putin, recently offered to cooperate with congressional intelligence committees in exchange for a grant of full immunity, according to three congressional officials, speaking on condition of anonymity because they were not authorized to discuss the issue publicly. But the Senate and House panels turned him down because of concerns that immunity agreements create complications for federal criminal investigators, the officials said. Mr. Deripaska, who lives in Moscow, has long had difficulty traveling to the United States. The State Department has refused to issue him a business visa because of concerns over allegations that... Link to the full article to read more