23.01.1966 (58 years) (Los Angeles, California, USA)
John Arthur Heilemann (born January 23, 1966) is an American journalist and national affairs analyst for NBC News and MSNBC. With Mark Halperin, he co-authored Game Change (2010) and Double Down (2013), books about presidential campaigning. Heilemann has formerly been a staff writer for New York, Wired, and The Economist.