President Donald Trump called OPEC out on Twitter once again on Thursday, pressing the oil “monopoly” to stop driving prices higher. The US President’s latest tweet, while calling on the cartel to “increase the flow of Oil”, used a rather friendly tone, which is different from previous tweets on the same subject that go further back than his presidency. Today’s message to OPEC cited the world’s fragile markets and the high price of oil. In the past, the tone has been far more critical, citing higher gas…