I recently answered this question on Eminent Domain statistics with decent citations. Other discussions in the comments were relevant (and not the "debate club" that often results in these deletions). Why was this question deleted by the Community moderator? It was reasonably asked and answered, and could be used in response to future duplicate questions about Eminent Domain.
It wasn't deleted by a mod, it says it was deleted by the "Community" user.
That usually means that some automated process did it. At a quick glance, the question doesn't seem to have a lot of flags or downvotes, so I'm not sure what triggered that automatic process.
Another thing I noticed is that the User's name is greyed out, which means that he doesn't have an account for Politics.SE, which might be related to why the Community user is listed as the deletion user.