Gov. Jon Corzine's campaign says his schedule won't allow him to participate.
And Gannett New Jersey reported Thursday that his Republican challenger, Chris Christie, would not agree to a debate pitting Christie one-on-one against independent Chris Daggett.
All three candidates have agreed to participate in two debates, scheduled for Oct. 1 and Oct. 16.
The lieutenant governor candidates will debate on Oct. 8.
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