Did the Yankees win a world series solely because of Babe Ruth? Of course not. Babe had help -- Lou Gehrig, Tony Lazzeri, and others.
Did Babe Ruth contribute to the outcome? Yeah, he did.
Did the world fall apart solely because of Barack Obama? Of course not. It's always falling apart to a certain extent.
Has Obama contributed to the current outcome? Yeah, he has.
This is not deep thinking.
This question is right up there with “Is Obunga a muslim?”