Jae Lee came to the United States legally as a child but never became a citizen. In 2009, he pled guilty to a drug crime after his lawyer assured him that he could not be deported as a result. The lawyer was wrong, because the conviction made Lee subject to mandatory removal. When Lee learned of this mistake, he asked the court to vacate his plea so he could instead face trial, arguing that his counsel’s assistance was ineffective. The district court denied this motion because of the overwhelming evidence against Lee, ruling that his conviction at trial was so certain that his counsel’s bad...