(ANSA) - BRUSSELS, JULY 10 - The EU has to "keep its borders open because this openness is in the spirit of the Union", said the candidate nominated by the 28 EU member countries for the post of president of the European Commission, Ursula von der Leyen, answering one of the members of the Renew Europe group, who asked her to comment on the proposal for a physical barrier between Italy and Slovenia. (ANSA).