Per my interpretation, this all amounts to something troubling, but not definitively something solid pointing to let's say a quid pro quo. So to me this doesn't close the question of whether "it happened".
> “grave counterintelligence threat,”
Somebody's opinion about what could happen or might have happened.
> "very real counterintelligence threat"
The opinion of a member of the opposing political party about what could happen or might have happened.
> narratives
This sounds like something that could be part of collusion but I'd need to see the rest. It's open to interpretation and I don't trust the media enough to assume they wouldn't imply something like this without having something big behind it. Indeed they hint at things without actually stating them because they're not actually true all the time.