OREGON, Wis. -

Gov. Scott Walker says his 19-year-old son's decision to act as a witness at the same-sex marriage of a relative is not a policy statement.

Walker was asked Tuesday about his son Alex's decision to serve as a witness to the June 9 wedding in Waukesha County. The marriage was between the first cousin of Walker's wife Tonette and her female partner.

Walker says he was aware that his son was attending the wedding, but Walker himself was in New York at the time of the ceremony. Walker says of Alex's decision to be a witness, "He doesn't need my blessing to do anything he does."

Walker is a longtime opponent of same-sex marriages and is defending the state's ban which a federal court judge last month said was unconstitutional.