Participation in the Nov. 10 debate was based on 4 recent polls: the candidates needed to average 2.5 percent or higher to be featured in the main debate, and 1 percent or higher to be in the undercard debate.
The candidates in the undercard are Christie and Huckabee as well as Jindal and Santorum, who have been in previous undercard debates.
Christie and Huckabee were close to making it into the main event with both averaged 2.25 percent in the polls.
Pataki and Graham were cut from the undercard debate, so they will not participate in either debate Tuesday. Gilmore has not qualified for any debates.
This is also the first time there will only eight participants in the main stage debate. The last GOP debate had 10 main stage participants.
The debates will air (and stream online) this Tuesday Nov. 10 at 7 p.m. and 9 p.m. ET on Fox Business.