This was a couple of days ago.
He shouldn't have done this as it calls his motives into question. Warren and Sanders are the biggest threat to, his baby, Obamacare. They're running on Medicare for all and I'm sure Obama wants to preserve his legacy.
Some of the left wing proposals are far too radical for the USA. Sorry to say, but the Americans I know are too entrenched in their ideology and not to open to this much change. I dont claim to speak to anyone other the guys who I know who treat their medicare like its a flash car and people should be envious. Then I tell them about our system and they think I'm lying.

I dont think America is ready to this much change.
Dont get me wrong, its Bernie all the way for me. I want a genuine battle between the left and right. It might set a president around the world if the left wins.