Is a "retweet" by White House chief of staff Ron Klain partly responsible for President Joe Biden's COVID-19 vaccine mandate taking another loss in federal court? What happened? The U.S. Court of Appeals for the Fifth Circuit again ruled against President Joe Biden's COVID-19 vaccine mandate Friday. According to the court, the mandate — which is enforced as an emergency temporary standard via the Occupational Safety and Health Administration — is "likely unconstitutional." The court explained: The Constitution vests a limited legislative power in Congress. For more than a century, Congress has routinely used this power to delegate policymaking specifics...