People Before Profit has claimed there is a "historic opportunity" in this general election to create a government without Fine Gael and Fianna Fáil.
Speaking in Dublin, Brid Smith said this meant that Sinn Féin needs to "categorically rule out" going into government with either big party, and voters need to know their position before election day.
She suggested that without such a guarantee, people voting for Sinn Féin and seeking change could find that their vote could be "wasted."
Supporting that position, Paul Murphy of RISE said it was absolutely clear that "radical change is not going to come from either Fine Gael or Fianna Fáil."
He warned that Sinn Féin voters could find themselves "sorely disappointed" if the party went into government with Fine Gael and Fianna Fáil.
Responding to the call, Sinn Féin leader Mary Lou McDonald said she would not rule out a coalition with Fianna Fáil or Fine Gael and said it cannot solve the country's problems without getting "stuck in".
