The latest salvo in US President Donald Trump’s trade war is set to hit Ireland worst of all EU countries targeted – two weeks before a possible no-deal Brexit.  If the tariff hike of 25 per cent announced by the White House this week is implemented on October 18 as threatened, the heavy dairy share in both Ireland’s export mix and in the US hit list of over 150 product categories means this country would suffer the heaviest impact. The tariff increase is in retaliation for EU subsidies in favour of Airbus, which a WTO panel has found illegal. France,…