Back my deal or #Brexit might not happen - that was the PM's message to Brexiteers at the weekend - but will DUP back the plan?

Back my deal or Brexit might not happen - that was the Prime Minister's message to Brexiteers at the weekend. But will the DUP back the Chequers plan? The PM hasn't much room for manoeuvre according to the DUP. So - is this the Brexit people voted for? Should the DUP back the deal? Vinny got the views of commentator Nelson McCausland and the Alliance Party deputy leader Stephen Farry.