John Bolton has either been fired from the Trump administration, resigned from it, or a sort of mutual combination of the two.
Regardless of the circumstances, it does not appear to be a major loss.
Bolton was a loose cannon who publicly disagreed with Trump on several issues, and was bringing nothing constructive to the table.
It was a mistake to hire him and is an embarrassment for him to leave this way. But, all things considered, better out than in.
He won’t be missed.