"Obama and his aides have, rather gently, made the one-president point. After Trump took a phone call with the president of Taiwan, Obama observed: “Since there’s only one president at a time, my advice to him has been that before he starts having a lot of interactions with foreign governments other than the usual courtesy calls, that he should want to have his full team in place.”
Not only did the president-elect fail to heed the message — he bristled at it. With typical Trumpian gall, he managed to take umbrage at Obama’s conduct during the transition. “Doing my best to disregard the many inflammatory President O statements and roadblocks,” Trump tweeted Wednesday morning. “Thought it was going to be a smooth transition — NOT!”
Trump’s definition of a smooth transition: one that goes entirely his way. So what were these “inflammatory” statements that set Trump off? Just about anything can trigger his wrath. Perhaps it was Obama, at Pearl Harbor with Japanese Prime Minister Shinzo Abe, exhorting Americans to “resist the urge to turn inward” or “to demonize those who are different.” Perhaps it was Obama boasting he would have beaten Trump if allowed to run."