BOULDER, Colo. (CBS4) – The University of Colorado in Boulder is getting ready for next month’s Republican presidential debate and there will most likely be a smaller pool of candidates on stage at the Coors Events Center.

Candidates in the top-tier of the debate must have an average of at least 3 percent in six national polls from Sept. 17 to Oct. 21. That currently leaves out Rand Paul, Bobby Jindal, Rick Santorum, George Pataki and Lindsey Graham.

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The other debate will feature candidates who have 1 percent, and not all of them make that mark.

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The debate is scheduled for Oct. 28.

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Democrats will get their turn in Las Vegas on Oct. 13.