european union brexit was just been given the okay. theresa may faces a battle back home in that agreement has been condemned but you now have to lobby to get it approved and ratified by parliament or risk leave the european union in march without any formal exit plan. cnn's erin mclaughlin is in paris. this is a remarkable day but not totally unexpected. >> no. >> reporter: it was expected that the 27 remaining eu leaders would sign off on the so-called brexit deal but, nevertheless, the leaders here saying that this is a historic day. it's also a sad day for the european union. essentially what they have done is endorsed two key documents, the so-called divorce deal, a