In the wake of substantial spending by Amazon (and others) in 2019 city council elections, Seattle contemplates a Clean Campaigns Act purporting to limit contributions to Super PACs, and to limit spending from corporations with more than 1% ownership from a single foreign national or 5% ownership from multiple foreign nationals.
They know there are substantial legal questions (including in the Ninth Circuit) – there’s a good article from The Stranger on some of the legal backdrop.