Two law professors with a long history of presenting “indefensible” theories to support former President Donald Trump are asking permission to argue to Judge Aileen Cannon that special counsel Jack Smith’s classified documents case is unconstitutional, court records show. Seth Barrett Tillman, a constitutional law professor who teaches in Ireland, and Josh Blackman, a professor at South Texas College of Law Houston, filed Thursday a request for permission to submit an amicus brief they say will prove Smith’s case is unconstitutional. “If Special Counsel Smith is an ’employee of the United Stat…