OLYMPIA, Wash. (AP) — The race for Washington’s 10th Congressional District is certain to be between two female Democrats, but one of the two is still undetermined as ballots in the state’s vote-by-mail primary continue to arrive at elections offices. With the announcement of Democratic U.S. Rep Denny Heck’s retirement from Congress, the open seat in the district drew 19 candidates. The district includes most of Pierce and Thurston counties, including the state capital of Olympia, and part of Mason County. Former Tacoma mayor Marilyn Strickland advanced to the November ballot with just over 21% of the vote, while Democratic state lawmaker Beth Doglio and former state lawmaker Kristine Reeves were vying for the second spot. Doglio had nearly 15% of the vote, while Reeves had just under 13%.