He will crumble when Putin challenges him.
But Putin knows full-well that Obama is not America. Obama is only the affirmative action part of America...and that part is irrelevant.
America is a core without leaders...which means that our system of selecting our leaders is broken.
Our leaders are still here...just not in plain sight.
Putin knows this. He will not attack us.
If he did attack, all hell would break loose.
Putin knows this.