Yes, that is the general consensus. However, I disagree. Take a long look at Ronald Reagan, George W. Bush and Rick Santorum as good examples of ENFj's. Love them or not, they have all took a stand (right or wrong) and stuck with what they believed.
I don't know enough about Michelle Obama.
Always a key, "Behind every great man there's a great woman". And to add to that, I have found also a duality intertype relation. "Behind every great personality there's a duality intertype relation".