The first time you'll get to see Ex-Sen. Fred Thompson challenge his fellow Republicans in a debate will be October 9 in Dearborn, Michigan.

It's sponsored by CNBC, MSNBC and the Wall Street Journal and will focus, generally, on the economy.

Per Thompson's campaign, he'll participate in an October 14 ABC News/WMUR/New Hampshire Union Leader debate and a Fox News debate in Florida on October 21.

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