Bob Barr, George Will and David Horowitz aren`t names you would associate with liberal causes. But they`re being used in a campaign speaking out against a constitutional amendment banning gay marriages. The Human Rights Campaign has placed ads using quotes from conservatives speaking out against the ban. The men aren`t in favor of gay marriage. But they are against redefining the definition of marriage through a constitutional amendment. The Bush Administration says it`s considering the ban but is waiting on rulings from state courts on gay marriage.