Since taking the helm of the committee that oversees the nation’s health care system last year, Senator Bernie Sanders has used his perch to take aim at pharmaceutical executives over the cost of prescription drugs. Next week, the CEOs of drug manufacturers Johnson & Johnson, Merck, and Bristol Myers Squibb will appear before the Health, Education, Labor and Pensions Committee to testify at a hearing concerned with the high prices of prescription medication in the United States as compared to ot