Was LBJ alone on the plane when he took the oath, or were there witnesses?
So if Obama said he took the oath all by himself and that he has video of it but won’t show anybody the video, that would be proof enough that he fulfilled the Constitutional obligation to take the specific oath that’s required in order for him to assume the duties and have the powers of the presidency?
If he says he fulfilled the Constitutional requirement then he did, regardless of any evidence that he shows anybody else?
Do you really think that the Constitution would have us blindly trust a politician like that?
There were witnesses as prescribed by law when LBJ took the oath of office.
United States Code, Title 5, I believe, stipulates the requirements for administering an oath.
Obama couldn’t take the oath all by himself. So the scenario you provide is unrealistic.
Chief Justice John G. Roberts Jr. re-administers the oath of office to
President Obama in the Map Room. (By Pete Souza -- White House)
Reporters were only alerted to Roberts's presence when one of them overheard
Obama's adviser, David Axelrod, in a conversation in a corridor.
Four reporters were invited to witness the second ceremony, along
with a photographer. Also present were Axelrod, Robert Gibbs, the White
House press secretary, and Greg Craig, the White House counsel.