Editor's Note: This story was updated with new information from Washington's exchange. Several state-based exchange will extend their special enrollment periods through Aug. 15 or beyond to better align with the federal government’s decision to keep healthcare.gov open longer so consumers can access the increased Affordable Care Act tax credits available under the American Rescue Plan. Healthcare.gov has been open since Feb. 15 and the administration initially planned to close the enrollment window on May 15. But...