Immediately after the election, I was advised of all new White House content. Now I only receive about a third of them.
So, if you want to be sure to downvote everything coming out of the Biden Occupation, you need to periodically go to the White House channel home and downvote from there.
Well, while I'd bet the scrubbing of downvotes is insidious on YouTube's part, I'm just saying this might just be some BS algorithm trying to increase watch time.