Hundreds of workers from 14 Pennsylvania nursing homes went on strike today after contract negotiations failed to produce a deal. About 700 unionized workers walked off the job in a dispute over pay, benefits and staffing levels. Photos and video on social media showed picket lines going up outside many of the homes, with workers carrying signs and wearing the purple T-shirts of their union, SEIU Healthcare Pennsylvania. “Our goal has always been — and continues to be — to get a fair contract that invests in this entire workforce and will meaningfully address the staffing crisis,” said Matthew Yarnell, SEIU president.