Seven of Dana Perino's ten nearest neighbors by audience shape are Journalists — a subcategory she does not belong to herself. The top 10 scores span a narrow band from 0.96 to 0.98 (audience similarity measures how closely two entities' audience compositions resemble each other), which is the defining feature of a flat shape: no single neighbor dominates, and the cluster holds together as a type rather than a hierarchy.
Brit Hume leads at 0.98, followed closely by Bret Baier at 0.98 and Martha MacCallum at 0.98, with Shannon Bream at 0.97 and Bill Hemmer at 0.97 rounding out the journalist core. Katie Pavlich at 0.97 and Andrea Tantaros at 0.96 extend it further. The two neighbors who share Perino's own TV Personalities subcategory — Kat Timpf at 0.96 and Greg Gutfeld at 0.96 — sit at the bottom of the set, not the top. Newt Gingrich at 0.97 is the lone Politician in the top 10.
The overall picture is an audience shaped primarily by the journalist cluster rather than by TV personality peers, with the scores compressed tightly enough that the distinction between neighbors is minimal.