Amazon is pausing the unprecedented spree of headquarters construction that transformed the city of Seattle over the last decade, suspending plans to add 7,000 to 8,000 jobs in 1 million square feet of new office space.

Whether it’s a political maneuver to influence City Hall or an actual change in direction remains to be seen. But it could spook developers of housing and offices planning on Amazon’s continued growth.

Amazon has drawn a line in the sand and is sending a clear message to Seattle City Hall—approve this tax and we’re out.