Daniel "Donie" Cassidy (born 15 September 1945) is an Irish former Fianna Fáil politician who served as Leader of the Seanad from 2007 to 2011.
Cassidy was President of the Oireachtas Golf Society during the "GolfGate" controversy in August 2020, in which 81 prominent figures attended a dinner in Clifden, County Galway during COVID-19 restrictions.
In a statement, he said: "In light of the ongoing controversy surrounding the Oireachtas Golf Society dinner in Clifden, and due to the fact that the matter is subject to a garda investigation, I tendered my resignation as Leas Úachtaráin of Fianna Fáil to Sean Dorgan General Secretary yesterday.
"[4] In February 2021, it was announced by the Garda Síochána that Cassidy is to face charges over alleged breaches of COVID-19 regulations by arranging by golf dinner.
The Court concluded: “They were all responsible people who would not have gone to a dinner unless they felt comfortable and unless the organisers had not put in place all that was required to make it safe.