ProPublica is a Pulitzer Prize-winning investigative newsroom. Sign up for The Big Story newsletter to receive stories like this one in your inbox. The former pharmaceutical executive tapped by President Donald Trump to lead the administration’s race to a COVID-19 vaccine is refusing to give up investments that stand to benefit from his work — at least during his lifetime. The executive, Moncef Slaoui, is the top scientist on Operation Warp Speed, the administration’s effort to develop a coronavirus vaccine in record time.