Former US president Donald Trump on Saturday congratulated Russian President Vladimir Putin on a major prisoner exchange between Russia, Belarus and several Western states. “I’d like to congratulate Vladimir Putin for having made yet another great deal,” the Republican presidential candidate said at a campaign event in Atlanta, in the US state of Georgia. “They released some of the greatest killers anywhere in the world,” Trump said. “Some of the most evil killers they got. And we got our people back, but boy, we made some horrible, horrible deals. And it’s nice to say we got them back, but do…