Mealey's (October 30, 2018, 3:26 PM EDT) -- WASHINGTON, D.C. — Whether Washington state’s tax on gasoline haulers is a legal tax on fuel possession or an impermissible tax on an Indian tribe’s treaty-protected right to travel was the subject of U.S. Supreme Court oral argument on Oct. 30, with the justices voicing support for both sides of the dispute (Washington State Department of Licensing v. Cougar Den, Inc., No. 16-1498, U.S. Sup.)....