He was also a frequent moderator of presidential debates and likened the job to ‘walking down the blade of a knife’

Jim Lehrer, co-host and later host of the nightly PBS NewsHour that for decades offered a thoughtful take on current events, has died, PBS said on Thursday. He was 85.
Lehrer died “peacefully in his sleep”, according to PBS. He had suffered a heart attack in 1983 and more recently, had undergone heart valve surgery in April 2008.