The debate, which starts at 6 p.m. PT, has a higher qualification threshold than the first event.
Candidates also had to sign a loyalty pledge to support the eventual nominee.
That is why Donald Trump, the front runner, was not on the list.
GOP candidates on stage at the first 2024 Republican presidential debate in Milwaukee last month.Scott Olson/Getty Images
He already had said that he would not participate.
The debate also will be livestreamed on Fox Nation and Rumble.
