"I am really upset at Philip's music being used in Mitt Romney's campaign in a political way that Philip would not have approved of," she said.
"As far as I am concerned, Mitt Romney's opposition to gay marriage and to civil unions for gays makes him anti gay -- which is not something Philip would have supported.
"He had some wonderful gay friends, as indeed I do, and they deserve equal treatment in every respect whether in Ireland or the United States.''
She also stressed that her son would not have supported policies "of taxing the poor and offering tax cuts to the rich'', as proposed by Paul Ryan.
"There is no way I would want the Lynott name to be associated with any of these ideas,'' she said to 'Hot Press' magazine.