Senate health committee Chair Lamar Alexander (R-TN) is taking the lead in the Senate on whether to eliminate drug rebates in commercial insurance, but health committee member Sen. Bill Cassidy (R-LA) also is writing two rebate bills. Neither senator has decided whether to introduce legislation. The rebate policy took on added importance this week after some drug company executives conditioned lower list prices on a rebate ban in both public insurance programs and the commercial market -- HHS proposed banning...