The PM Boris Johnson has confirmed he won't accept a Northern Ireland-only backstop as a solution to the Brexit deadlock. That's according to the DUP. But can the party trust the PM? Remember he told the DUP party conference last year it was time to junk the backstop only to vote for it later. Stephen spoke to DUP MLA Jim Wells, SDLP MLA Claire Hanna and commentator Newton Emerson.