He has subsequently decided to run for state Lt Gov. Says he was 'tired of the crap in Wash DC.'
Anyway, it is a fairly safe blue seat, so the only loss will be the guy's experience in the House. There are a couple of intriguing female and LGBTQ candidates in the primary, so we'll see.
Rep Andy Heck, WA10
https://www.seattletimes.com/seattle-news/politics/in-race-to-replace-denny-heck-in-congress-three-democratic-women-step-forward/
The contest to replace Rep. Denny Heck in Congress, the only representative Washingtons 10th Congressional District has ever known, has drawn 19 candidates, more than twice as many as any other U.S. House race in Washington.
The leading candidates, judging by fundraising numbers and their ability to field a robust campaign, include two state legislators, a former Tacoma mayor, a socialist truck driver, a former staffer for Heck and a 25-year Army veteran.
Hecks retirement announcement in December he subsequently decided to run for lieutenant governor when the incumbent, Cyrus Habib, decided to become a Jesuit priest triggered the free-for-all for the open seat in whats generally seen as a safe district for Democrats.
More about the candidates at link.