We have an American citizen facing prison for missing movement and refusing to obey the lawful orders of his brigade commander. The deed has been done, there is no changing of mind or putting this particular genie back in the bottle. Obama could release his long form tomorrow and Lakin would still be tried and still be convicted.
No Seq, we have an officer of the US military openly requesting that the commander in chief provide qualifying documents proving his eligibility. He didn't miss movement because he was at a frat party.
Sorry.
Not if it shows he was not born in the US.
The Manual for Courts Martial specificially indicates that the authority of the order giver is a factor in the lawfulness of the order.