A catchphrase winking at an unfounded voter fraud conspiracy in the presidential election trended on Twitter on Tuesday morning as President Trump’s allies continued to contest the outcome of the election, which has been called for Joseph R. Biden Jr. The phrase, “Release the Kraken,” appeared on Twitter’s trending topics list on Tuesday, collecting nearly 100,000 tweets, pushed mostly by conservatives and far-right internet personalities. The conspiracy stems from a Fox Business Network appearance last Friday by Sidney Powell, a lawyer for the former national security adviser Michael T. Flynn. During an interview with the host Lou Dobbs, Ms. Powell...