Senator Chuck Grassley (R-Iowa) recently made waves claiming that pharmacy benefit managers (PBMs) are to blame for the volatility of insulin prices. It's a bold statement, to be sure. But here's the thing: the senator is absolutely right — and PolitiFact has confirmed as much. On January 31, 2021, PolitiFact partnered with The Daily Iowan to release a fact-check on Grassley's statement, ultimately providing the senator with its highest rating of "True" on the organization's Truth-O-Meter™. "With their complicated discount negotiations," PolitiFact concludes, PBMs play a role in driving upward the cost of insulin in America. One fact that may...