In December 2008, he sent silk ties (worth €25 each) to approximately 400 County councillors.[4] He is the Fianna Fáil Seanad spokesperson on Transport, Tourism and Sport. In June 2011, it was revealed that 3,600 premium line votes from a phone in Leinster House at a cost of €2,600 to the Irish taxpayer helped Michael Healy-Rae win Celebrities Go Wild in 2007.[5] O'Sullivan admitted making "around a dozen" calls and texts to support Healy-Rae after being asked to do so by Healy-Rae's campaign manager.[6]
He is the Fianna Fáil Seanad spokesperson on Tourism and Heritage.