When Seattle approved Uber and Lyft drivers organizing in December, the city did it knowing that the practice was illegal. Independent contractors aren't allowed to do so under federal law because it basically amounts to price fixing. And now the inevitable has happened: The United States Chamber of Commerce is suing Seattle because the city allowed the on-demand workers to unionize, Reuters reports. It doesn't sound like Emerald City is going down without a fight, though. Councilman Mike O'Brien says that there are "millions of dollars" in place for what could be a lengthy legal battle.