McCarthy's claims were far broader than that (and virtually all spurious). From a specialist historian:
> But if McCarthy was right about some of the large issues, he was wildly wrong on virtually all of the details. ... virtually none of the people that McCarthy claimed or alleged were Soviet agents turn up in Venona. ... The new information from Russian and American archives does not vindicate McCarthy. He remains a demagogue, whose wild charges actually made the fight against Communist subversion more difficult.
> But if McCarthy was right about some of the large issues, he was wildly wrong on virtually all of the details. ... virtually none of the people that McCarthy claimed or alleged were Soviet agents turn up in Venona. ... The new information from Russian and American archives does not vindicate McCarthy. He remains a demagogue, whose wild charges actually made the fight against Communist subversion more difficult.
https://www.frontpagemag.com/fpm/212053/setting-record-joe-m...