It's whatever CNN and Fox decide (we all know that)
Look what Fox thinks is the big news today vs CNN
The big story of the moment on CNN is chemical attack in Syria
Note - no mention on Fox News of the Bill O'Reilly revelations at all.
Also, Fox has ten plus stories about Susan Rice (which is also what they think is the biggest story of the moment) but not a single story (that I see) explaining how that the unmasking process works.
CNN on the other hand has a story explaining how it works and claiming nothing was done improperly
If you only watch Fox you'd think this was some kind of huge scandal
If you only watch CNN you'd think this is much ado about nothing
How have these types of things worked out in the past (think about any claim that Trump has made or even go back and think about Clinton email, Benghazi etc..)
Which network seems to always get it wrong
Hint = It's the same network that seems to have institutionalized sexual harassment for 20+ years