Sen. Kamala Harris is the latest Democratic presidential candidate to vow that Americans would not pay more for drugs than other countries pay, if she is elected. The proposal comes as the Trump administration’s drug-pricing policies have been winnowed down to foreign reference pricing and drug imports: HHS scrapped proposals to ban drug rebates and change protected drug classes and was blocked in court from requiring price disclosures in drug ads. The California lawmaker says she would direct HHS to...