David Plouffe's top 10 nearest audience shapes are drawn entirely from political journalists — not a single fellow Politician appears among them. Similarity here measures how closely two entities' audiences resemble each other in composition; a score near 1.0 indicates near-identical audience shape.

The top 10 form a tight, undifferentiated band of political press correspondents, ranging from Glenn Thrush at 0.99 down to Ashley Parker at 0.98 — a spread of less than 0.008 across all ten positions, which is what the flat shape classification reflects. Josh Dawsey (0.99), Jeffrey Goldberg (0.99), Maggie Haberman (0.98), Sam Stein (0.98), Brian Stelter (0.98), Ryan Lizza (0.98), John Dickerson (0.98), and Jonathan Martin (0.98) round out the cluster. Every one of them carries the Journalists subcategory. No Politicians, no Government Officials, no Academics appear in the top 10.

The cross-kind pattern here is the central finding: Plouffe's audience looks more like the readership of White House beat reporters and political media figures than it does like the following of other politicians. The audience is shaped by political media consumption, not political identity.