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Uhh...this isn't Richard, it's Andrew Shepherd.
— Sheperd ‧ The American President

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The hesitant opening leads into a simple correction of identity: not Richard, but Andrew Shepherd. Giving the full name makes the distinction explicit. The small pause and straightforward phrasing make an ordinary clarification sound slightly awkward, without explaining how the confusion arose.
Context reviewed