I know from personal experience that she moderates (or instructs someone to moderate) comments on her blog. But outside of my personal experience, which was many, many months ago, others have made the same claim. She has never posted one single comment (that I’ve submitted) notifying her that certain of her claims have been totally debunked. (e.g. 1981 Pakistan travel ban) So she certainly has the opportunity to refuse comments with which she disagrees.
The comment has been up since March 9th. It was approved for publication. She’s had the opportunity to remove it. She hasn’t.