All’s fair in love and war, but not in Washington’s liquor monopoly. The state’s Liquor Control Board (LCB) is running into problems again, this time with the nation’s largest membership warehouse chain, Costco. Issaquah-based Costco has filed a lawsuit to do away with Washington’s antiquated law that prohibits the company from purchasing alcoholic beverages from out-of-state distributors. Costco believes the LCB regulations violate the Commerce Clause of the U.S. Constitution and the federal Sherman Antitrust Act. The state’s monopolistic liquor laws also violate a sense of basic market fairness. Currently, Washington does not allow companies to buy liquor from out...