If it had been up to me there would have been a commission formed called the Never Again Commission after the unfortunate administration of G.W. Bush.
 Mistakes got made in those years that should have been examined and enshrined into a Never Again manual for our country. After his election President Obama simply moved forward and did not cast blame. There was an enormous and difficult mess to deal with. The Republicans did everything they could to vilify him. They had nothing, absolutely nothing constructive to contribute. That is not my construct just the facts. 
He was careful, thoughtful, and genuine in his attempts to find and work with consensus. I personally appreciate those qualities as ones I would like to be better at. The example President Trump brings to us is something else.
Nothing to emulate there. Sessions chose his bed... now he lied in it.