You need to have a legitimately-elected, eligible President in order to impeach him.
We are one short.
Having read your About page, I will say that as you well know in order to select the proper solution to a problem, it is necessary to properly identify its material aspects.
Impeachment is the only way to rid ourselves of Obama prior to the expiration of his term, and I submit it could also be the fastest method of any that was attempted.
If you do not believe Obama is the President, ask any member of Congess, or for that matter any member of our military forces for the name of our President.