He was elected for the first time to
Dún Laoghaire–Rathdown County Council on 11 June 2004, having spent more than €45,000 on his election. On his election to the
Seanad, Regan was appointed by Enda Kenny as party Seanad spokesperson on Justice, Equality and Law Reform and was made a member of the Joint Committee on the Constitution and the Joint Committee on Justice, Equality, Defence and Women's Rights. Regan, along with
Seán Barrett and fellow Councillor
John Bailey, were selected as Fine Gael candidates to stand at the
2007 general election in the
Dún Laoghaire constituency. Only Barrett was elected for Fine Gael. Regan received the support of former
Taoiseach Garret FitzGerald who intervened in a general election for the first time since leaving the Dáil in 1992. Support also came from
Alan Dukes and
Peter Sutherland. Regan served as
Cathaoirleach of Dún Laoghaire–Rathdown County Council from 2006 to 2007. He was elected to the Seanad on the
Agricultural Panel on 24 July 2007. He is known for bringing the issue of the
Willie O'Dea affidavit incident to the attention of the
Oireachtas which led to O'Dea's resignation as
Minister of Defence. He did not contest the 2011 Seanad election. ==References==