Dr. Donald Berwick might be running for Governor of Massachusetts, but he's still got a foothold in his former life. Berwick, most recently known as the acting chief of the Centers for Medicare and Medicaid, had a long record as the leading authority on health care quality, including being founder and CEO of the Institute for Healthcare Improvement. And it was more in that capacity that the British Prime Minister David Cameron asked Berwick for his recommendations for improving safety and restoring confidence after higher-than-expected death rates at one hospital rocked the country.