The idea that all of this is "not that complicated" and "pretty simple" is Ramaswamy's pitch. He's organized his campaign around the idea of simple truths. As expected, he's already drawn attacks from other candidates on the stage. Pence has already hammered him on his lack of experience.
-Analysis by Monica Potts of FiveThirtyEight

Christie received loud boos from the crowd as moderators introduced the Republican field at the start of the debate. As of August 2023, the former New Jersey governor’s unfavorability rating is nearly 49%, according to the latest polling averages [published by FiveThirtyEight], () while his favorability rating hovers at 23%.

-ABC News’ Nicholas Kerr and Olivia Osteen

On COVID-19, Republicans are not happy with the Biden administration’s response. According to a Ipsos/Reuters survey from August, only 27 percent of Republicans think the administration has done the right amount to promote public health and fight COVID-19, compared to 66 percent of Democrats and 55 percent of independents. Thirty-three percent of Republicans said the administration has done too much, and 30 percent said it has done too little.
-Analysis by FiveThirtyEight

Haley has been struggling to distinguish herself among the presidential field, so it's notable that she came out swinging against not just the men on the stage with her but Republicans in Washington, DC as well, for passing those substantial spending bills during the Covid-19 pandemic.
–Analysis from Jacob Rubashkin, Inside Elections

Recent initial primary debates have involved a lot of candidates — 17 for Republicans in 2016 and 20 for Democrats in 2020 — across two debates, either on the same night or across two evenings. To lead off the 2024 cycle, Republicans will have a more intimate affair, with eight contenders taking the stage tonight. That number could’ve been slightly larger, however, as nine GOP candidates met the RNC’s debate qualification criteria for polls and donors. But Trump isn’t participating, having refused to sign a mandated loyalty pledge promising to support the eventual GOP nominee in the general election, so there will be only eight lecterns on stage.

Eligible participants either earned 1 percent support in three national polls or at least 1 percent in two national polls and two polls from the first four states voting in the GOP primary (each coming from separate states), based on surveys that meet certain criteria for inclusion. They also attracted donations from at least 40,000 unique contributors, with at least 200 donors from 20 or more states and/or territories.

Meeting these criteria was straightforward for most of the candidates, as by the end of July, seven (including Trump) had enough qualifying polls and donors to make the stage. Lagging behind, Pence became the eighth eligible contender when his campaign announced on Aug. 7 that he brought in enough unique donors. Hutchinson had enough surveys in hand by late July, but he only announced on Sunday that he had reached the 40,000 donor mark, coming in just under the deadline.

But there was last-minute drama, as businessman Perry Johnson and Miami Mayor Francis Suarez each said they had qualified, only for the RNC to leave them off its final list of participants. Johnson in particular may have a bone to pick, as he claimed that the RNC initially indicated that he had enough polls, and our analysis suggests he did, too. Larry Elder, who along with Johnson hasn’t met FiveThirtyEight’s criteria for being considered a major candidate, also claimed he had made it,> but one of the polls he cited did not have a large enough sample size to meet the RNC’s criteria. Johnson and Elder announced yesterday that they were suing the RNC. Suarez, Johnson, Elder and Hurd all had enough donors to make the stage but, controversially or not, lacked the polls in the end.

-Analysis by Geoffrey Skelley of FiveThirtyEight