Who is the Mystery Convention Speaker?

Republican convention planners appear to have a surprise planned for those tuning in Thursday night, the Wall Street Journal reports.

“Buried deep in the convention schedule released Monday is a vague reference to a mystery speaker scheduled for the event’s final evening. ‘To Be Announced’ has a prime speaking slot late in the Thursday program.”

ABC News: “Top Romney advisors claim they have been left in the dark about a mystery speaker who may address the convention on Thursday night.”