Advocates for lower drug prices are hammering Sen. Thom Tillis as he tries to win reelection in a close race that political strategists say is critical to determining which party controls the Senate. Patients for Affordable Drugs is airing ads in North Carolina that say the GOP senator is too friendly to big pharma and not doing enough to protect patients from rising drug prices during the COVID-19 pandemic. The ads are a part of a new, multi-million-dollar campaign from...