https://www.reuters.com/article/us-uber-seattle-unions/u-s-court-revives-challenge-to-seattles-uber-lyft-union-law-idUSKBN1IC27C >A U.S. appeals court on Friday revived a leading business group's challenge to a Seattle law, the first of its kind, that would allow drivers for ride-hailing services such as Uber Technologies Inc and Lyft to unionize.