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Romney pulls out of March 1 debate, and CNN pulls the plug

So far during the GOP presidential contest, there have been 19 debates. And next week's -- in Arizona -- will be No. 20.

But it looks like there won't be No. 21.

First, the Romney campaign today said its candidate wouldn't be attending a March 1 debate in Georgia sponsored by CNN. The reason: Mitt Romney wants to use his time campaigning in the Super Tuesday states, scheduled for March 6.

"Gov. Romney will be spending a lot of time campaigning in Georgia and Ohio ahead of Super Tuesday," said spokeswoman Andrea Saul. "With eight other states voting on March 6, we will be campaigning in other parts of the country and unable to schedule the CNN Georgia debate."

In response, Gingrich spokesman R.C. Hammond fired off this tweet: "@MittRomney spits in Georgia's face and cancels Atlanta debate appearence."

He added, "If @MittRomney won't stand up and debate his GOP competitors how will he face President Obama?"

But the Paul campaign also said it was NOT participating. And the Santorum camp tells NBC News that they haven't confirmed with CNN their participation, either.

And now comes the word, via CNN, that it's pulling the plug on the debate. "Without full participation of all four candidates, CNN will not move forward with the Super Tuesday debate," CNN said in a statement. "However, next week, CNN and the Arizona Republican Party will host all four leading contenders for the GOP nomination. That debate will be held in Mesa, Arizona on February 22 and will be moderated by CNN's John King."