A prominent Seattle lawyer and a scion of a prominent Seattle family are suing a prominent politician -- U.S. Senate candidate Mike McGavick -- over his lucrative retirement package from a prominent Seattle company, Safeco. The intriguing cast of characters came together Tuesday in a shareholder lawsuit, heavy with political overtones, against Safeco's board of directors and McGavick, a Republican who was its chief executive. It was filed in federal court in Seattle. The complaint said Safeco paid the candidate $28.4 million in early 2006 in an illegal "waste of corporate assets" after he resigned to run against Democratic Sen....