Insider trading was a family affair for upstate New York congressman Chris Collins, federal prosecutors charged Wednesday. The Republican lawmaker, one of President Trump’s earliest supporters, was charged along with his son Cameron Collins and the father of Cameron’s fiancée, Stephen Zarsky, in a scheme that allowed them to avoid $768,000 in stock losses, prosecutors say. The trio are accused of securities fraud related to Innate Immunotherapeutics, an Australian biotechnology company. The elder Collins sits on the firm’s board of directors and is one of its largest shareholders. Manhattan federal prosecutors say the upstate New York congressman passed to his...