Defense Secretary Jim Mattis warned that Russia is actively working against a referendum in Macedonia that would clear the way for the Balkan nation to join the North Atlantic Treaty Organization.
Mr. Mattis, who flew to Macedonia on Monday to meet the country’s leaders in advance of the Sept. 30 vote, told reporters traveling with him that there was “no doubt” Russia has funded pro-Russian groups to work against the referendum and to hinder the small country’s attempts to join with the West.
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