Amid a targeted lobbying effort, Congress weakened the DEA’s ability to go after drug distributors, even as opioid-related deaths continue to rise, a Washington Post and ‘60 Minutes’ investigation finds. In April 2016, at the height of the deadliest drug epidemic in U.S. history, Congress effectively stripped the Drug Enforcement Administration of its most potent weapon against large drug companies suspected of spilling prescription narcotics onto the nation’s streets. By then, the opioid war had claimed 200,000 lives, more than three times the number of U.S. military deaths in the Vietnam War. Overdose deaths continue to rise. There is no...