They know who’s in charge
Part of what allows Obama and Biden to work well together is that, when the arguments and discussions come to an end, they both know who will make the final call.
“Mr. President, you know that with good reason there is no power in the Vice Presidency,” said Biden.
“I get to give you advice. I get to be the last guy in the room and give you advice on the most difficult decisions anyone has to make in the whole world. But I get to walk out, and you make it all by yourself. All by yourself.
“Harry Truman was right about the buck stopping at the desk. And I’ve never, never, never, never, never, never, never, never once doubted, on these life and death decisions, I never once doubted that your judgement was flawed. Not once. Not once.”