Presidential hopeful Mary Davis has called on her fellow candidate David Norris to explain any issues in his past.
The Irish Independent reports this morning that Mr Norris received a disability payment for 16 years while out of work as a Trinity College lecturer, during which time he was a Senator.
Mr Norris has confirmed he received the money but has refused to say how much it was for and what condition it related to.
Six of the seven candidates are speaking at an event organised by the charity sector in Dublin this morning, but David Norris refused to comment on the matter until his campaign launch later this morning.
Mary Davis said: "It's up to David Norris to explain that one…It's important for everyone to be transparent."