THE POLITICAL PARTY nominating conventions have caused greater bitterness and controversy this election than ever before. The Labour Party has had its problems in East Limerick where Councillor Michael Lipper was offered a ticket for tWo days "due to doctors ordcrs" and in Dublin North East where it took the threat of Party Leadcr Brendan Corish to resign to ensure Dr. Conor Cruise O'Brien was acceptcd as thc candidate in that area. Fianna Fail has had its problems too, again in East Limerick, Dr.