David Gergen, adviser to several presidents, dies at 83 

David Gergen, an advisor to 4 presidents, a TV governmental commentator and a best-selling author, died Thursday from Lewy assemblage dementia, according to reports. Gergen, calved successful North Carolina, served successful the Navy for 3 years earlier joining erstwhile President Nixon’s unit arsenic a code writer successful 1971. Then helium became manager of communications for…