Dear Senator:  On behalf of our nearly 5,000 member hospitals, health systems and other health care organizations, and our clinical partners – including more than 270,000 affiliated physicians, 2 million nurses and other caregivers – and the 43,000 health care leaders who belong to our professional membership groups, the American Hospital Association (AHA) is writing to express our views as the Senate deliberates the House-passed American Health Care Act (AHCA), legislation to repeal and replace the Affordable Care Act (ACA).