Comment: That's exactly what they're doing

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In reply to comment: Irritating. (see in situ)

That's exactly what they're doing

I think he should respond "I am not endorsing Romney"

This removes the "readiness" question from the equation. Also using
"will not" implies under no circumstance. Ron has often said if Romney comes around sincerely he would consider an endorsement, but that that scenario is highly unlikely.