Alabama and 10 other states are suing the Obama administration over a new directive about transgender students in public schools. The challenge follows a federal directive to US schools this month to let transgender students use the bathrooms and locker rooms that match their gender identity. Conservative states had vowed defiance since the Justice Department handed down the guidance. The lawsuit accuses the Obama administration of running roughshod over commonsense policies that protect children. It asks a judge to declare the directive unlawful.