(ANSA) - ROME, JUL 30 - President Sergio Mattarella took issue with politicians who criticise the European Union for being ineffective while, at the same time, impeding the bloc's ability to be more decisive with their stances and their actions. "I am well aware of the criticism directed at the Union for the lack of impact in its actions," the head of State said. "This criticism is levelled relentlessly, above all, by those who, in every way and under all circumstances, hinder the Union's abi...