(Olympia, WA)  --  Washington State Attorney General Bob Ferguson says he's suing President Donald Trump over his executive order to temporarily ban travel to the U.S. from seven Muslim-majority countries.  Ferguson says he's filing the federal lawsuit against the president, some high-ranking administration officials, and the Department of Homeland Security.  The suit seeks to invalidate the executive order nationwide.  Trump says the order is aimed at protecting the nation from acts of terrorism.