The call is coming from Laois/Offaly candidate Brian Stanley.
Sinn Féin say the closing gap in the latest opinion polls is justification for including leader Mary Lou McDonald in tomorrow nights TV debate.
An Irish Times poll has just 4% between Fianna Fail, Fine Gael and Sinn Féin after one week of campaigning.
The first head to head debate will take place between Leo Varadkar and Michael Martin on Virign Media on Wednesday.
Sinn Féin's Laois/Offaly candidate Brian Stanley says they have a right to be involved: