VANCOUVER, British Columbia—Nathan Chen ran away with Skate Canada on Saturday in an emphatic response to sub-par performance a week ago at Skate America. Third last week in Las Vegas after winning 14 straight events since March 2018, the 22-year-old American star finished with 307.18 points in front of a limited crowd at the University of British Columbia’s Doug Mitchell Thunderbird Sports Centre. Chen’s coach, Rafael Arutunian, was forced to watch from the crowd after his accreditation was removed because of an inadvertent violation Friday of the COVID-19 protocols at the event. Chen said the incident didn’t affect his performance. “I was still able to focus on my skate,” Chen said. “He’s taught us to be very self-sufficient. Really nothing changed in that regard.” The three-time world champion also who won the Grand Prix Final in Vancouver in 2019. Fellow American Jason Brown was second at 259.55, followed by Russia’s …