It emerged this morning that President Obama warned then President-elect Donald Trump about hiring the now disgraced Michael Flynn during a meeting after the election. This claim was acknowledged by a senior Trump administration official, according to NBC News.
Flynn was the director of the National Intelligence, and later the director of the Defense Intelligence Agency, under Obama. In 2014, he retired from the military after openly criticizing the Obama administration's stance on radical Islam. Flynn claimed that he was pushed into retirement.
Trump named Flynn as his national security adviser. But he was fired less than three weeks into the administration after it emerged that he had private conversations with the Russian ambassador to the United States before he was in office, and for misleading Vice President Pence about the nature of those discussions.