NEWBERG, Ore. (AP) — The teachers union in Newberg, Oregon, has filed a lawsuit over a policy passed narrowly by its school board, limiting what kinds of images or signs school employees can display on campus. The “Ensuring Safe Environments To Learn” policy bars school employees from displaying images “relating to a political, quasi-political, or controversial topic.” The lawsuit was filed Wednesday. Oregon Public Broadcasting reports the Newberg policy has been a lightning rod for controversy, with the ACLU, Democrats in the Oregon Legislature and the State Board of Education all issuing statements against it. The policy, backed by a four-member majority of the Newberg school board, started out as a directive to remove signs and posters showing support for Black Lives Matter and LGBTQ Pride.