Football is down nearly across the board. Look no further than youth football which is being decimated with parents pulling their kids from the sport. Football is losing it's fanbase from the ground up generationally.
Of course, traditional Nielsen ratings also aren't capturing the alternate means for watching football either. In Trump's drive to consistently point out "ratings", the cord cutters are having the primary impact on those ratings.
I'm sure the national anthem fracas is having a marginal effect on ratings but attributing the margin of ratings decline to that controversy is absurd.
Except that those numbers would seem to be consistent in other sports...so why would the NFL be the only one that was seeing such an impact if the issue was cord-cutting?
I know that I have lost a LOT of interest in watching the games precisely because of the overpaid politards screwing things up...it ceases to be entertainment when they quit playing. And now you get the dilweeds whining about the ESPN suspension of Hill, never mind that she was told to watch the politarding. She got canned for the same reason Schilling did...actually since she was only suspended, we cannot even say it was equal treatment. But at least ESPN seems to have paid attention that the lunacy from the left is impacting viewership.