Joe Biden would direct Medicare to negotiate prices of drugs that face little competition, using international prices as a reference, and the negotiated prices would be available to public and private insurers, according to the presumptive Democratic presidential nominee’s platform. Biden’s platform also would cap seniors’ out-of-pocket drug costs and limit drug price increases to the inflation rate. The details of Biden’s plan to curb drug prices resembles the drug pricing bill that House Democrats twice passed and that President...