It’s a feature bug that only Republicans are targeted.
Funny how that works.
Twitter says supposed ‘shadow ban’ of prominent Republicans is a bug
Shadowbanning is a quiet way of diminishing a person’s presence on a platform, making it so that only that person can see the content they post, not their followers or searchers. But that’s not what’s happening here: Twitter’s search isn’t autopopulating some handles, even when they are typed into search directly.