Seattle voters, in a rebuke to heavy corporate campaign spending by Amazon.com, have kept progressives firmly in control of their city council, reviving chances for a tax on big businesses that the tech giant helped fend off last year.

Amazon poured a record $1.5 million into a super PAC run by the Seattle Metropolitan Chamber of Commerce to back a slate of candidates in the Nov. 5 council elections viewed as pro-business, or at least more corporate friendly than the incumbent council majority.

Amazon, the world's leading online retailer whose chief executive is billionaire entrepreneur Jeff Bezos, accounted for more than half of nearly $2.7 million raised by the super PAC, a group allowed to accept unlimited sums from wealthy donors in support of their favorite candidates. Four years ago, Amazon donated $25,000.