The Australian | AWU serves subpoenas on Cash, De Garis The Australian The Australian Workers Union has served a subpoena on David De Garis, a former senior media adviser to Employment Minister Michaelia Cash, but his whereabouts are still not known. After controversy at a Senate estimates hearing today about the location ... Michaelia Cash claims 'public interest immunity' over union raid tipoff ROC officials warned about partisan 'private' conversations in estimates break Labor calls for Cash to stand down |