Bush twin lobbies for gay marriage

One of former president George Bush's twin daughters says she supports gay marriage.

The national gay rights group Human Rights Campaign has released a video featuring the 29-year-old Barbara Bush, who calls herself "a New Yorker for marriage equality" and says people should be able to marry the person they love.

The former president opposed same-sex marriage and endorsed a proposed constitutional amendment to outlaw it. Advocates say New York lawmakers may legalise gay marriage this year.