He's a blubbering idiot who has never effectively answered any questions during his candidacy with any truth, accuracy or intelligence. We are sure to see a repetition in his unethical and dishonest behavior and lack of local government process and global relations over the next 4 years. The press asks "hard" questions. Unless he can say Bigly, he has no answers.
President-elect Trump does know what he is talking about (for the most part) when it comes to today's issues. Trump campaigned on and successfully won the presidency by focusing on issues that Americans considered important: unfair trade, job losses, Washington corruption. Therefore, in the eyes of many Americans, Trump is very familiar with today's important issues.
Donald Trump knows very little about current issues. However, he is good at tricking uneducated people into thinking that he understands these issues. He learns bits and pieces about different issues, and he comes up with a "solution" that he thinks the uneducated masses will like. To the more educated population, it is painful to watch, because it is obvious that he has no idea what he's talking about.
No, President-elect Trump does not know what he is talking about when it comes to today's issues because he does not care to learn. He simply wants to have the title of president without doing any of the work. He will be a disaster for the world and we must fight against him.