Bush Child, in a Break, Endorses Gay Marriage By MICHAEL BARBARO The Bush dynasty is no stranger to generational conflict: father and son differed over deposing Saddam Hussein, raising taxes and the role of the United Nations. Barbara Bush in her video statement. Now it is father and daughter who find themselves at odds over a weighty issue. Barbara Bush, one of the twin daughters of George W. Bush, will endorse same-sex marriage on Tuesday, publicly breaking ranks with a father who, as president, pushed for a constitutional amendment banning such unions. Ms. Bush, 29, has taped a video calling...