I figured the crowded 1st Congressional District race was bound to turn negative eventually, because, you know, negative campaigning works. I just hadn't figured it would be a Super PAC independent expenditure targeting Suzan DelBene.
The mailer attacking DelBene's business record was sent out by a group called Progress for Washington, whose treasurer, Jeremy Pemble, is also a contributor to Laura Ruderman. According to a July 5 FEC filing, the PAC reported spending $21,328.38, enough to print and post about 40,000 to 50,000 mailers. I'd been told by a couple sources that Ruderman had been hinting to people that something big was coming. No idea if this is what she was allegedly talking about.