As you point out, we still have the court of public opinion when a persistent person breaks through the MSM blockade, as Trump and Corsi have done in recent weeks.
Obama felt compelled to release an image of a 1961 long form plunging birth narative credibility caused by Trump and Corsi. Obama obviously would have preferred to have whipped out that BC image at a later date of his own choosing (Corsi suggests October suprise 2012).
This play can be run again on Obama to provoke more desperate moves if Corsi’s narrative of a Kenyan birth and/or lack of two citizen parents takes hold in the court of public opinion.