Some in Fine Gael think Kate O'Connell would have retained the seat.
Leo Varadkar has said he doesn't believe Fine Gael would have won the Dublin Bay South by-election with Kate O'Connell as its candidate.
James Geoghegan placed second in yesterday's Dáil election in an area traditionally strong for Fine Gael.
Some in the party believe former TD O'Connell would have taken enough votes from winner Ivana Bacik to retain the seat for the party.
Tánaiste Leo Varadkar though, doesn't agree: