One of NBC's studio reporters on election nights in the 1960's, Frank McGee, was already quite famous as anchorman of that network's live coverage of space shots. Another studio reporter was John Chancellor, who would eventually become anchorman of "Nightly News".,
Regarding McGee; I made a comment elsewhere not too long ago on an upload of the TODAY show the day after George Wallace was shot wondering if McGee was used by NBC in a manner similar to ABC's use of George Stephanopoulos as a sort of "breaking news" anchor (i.e.: anchoring coverage of a major event); especially considering that in addition to the examples you cited; McGee did most of the heavy lifting in terms of anchoring from the studio when both John and Robert Kennedy were gunned down (with the JFK assassination coverage; McGee and Bill Ryan, a local anchor at WNBC, handled most of the studio coverage while Chet Huntley didn't contribute much in New York {David Brinkley chimed in from time to time in his usual Washington base; but from the footage I've seen NBC didn't go to him very much}; while of the footage of the RFK assassination coverage that has surface {just over an hour and a half} Chet and David appear once apiece to my knowledge while Frank handled most of the studio coverage again)
