Trump maintains a lead of 27 percentage points over Haley, his nearest competitor in South Carolina, according to polls conducted since the first debate. Haley’s average support has grown by 9 points since the first debate, while DeSantis and Scott have fallen.

According to a September survey from Beacon Research/Shaw & Co. Research/Fox Business, 69 percent of likely South Carolina Republican primary voters say they support their first-choice candidate strongly, while 28 percent say they support them only somewhat. Among those that list Trump as their first choice, 86 percent say they support him strongly, while the second-place candidate, Haley, has only 57 percent saying the same.

In a September survey by Monmouth University/The Washington Post, South Carolina primary voters are split on whether the Republican Party should nominate a candidate who agrees with them on major issues (51 percent) or one who can beat Biden (45 percent). Among voters who say they are very or somewhat conservative, selecting a candidate who can beat Joe Biden is more important by a margin of 7 and 11 percentage points, respectively. Voters who say they are moderate or liberal prefer a candidate who agrees with them on major issues by 31 percentage points.

—Analysis by 538

Hours before the seven Republicans who qualified for the second RNC debate would have taken the stage at the Reagan Library in Simi Valley, California, a few hopefuls shared their pre-game time rituals.

Pence got a workout in, did some light preparation work, and spent time with his wife, former Second Lady Karen Pence, daughter Charlotte and granddaughter Etta, according to a campaign adviser.

Scott spent the day with family. He took time for prayer, some devotionals, and worked out at the gym. The tune on repeat in his headphones this week has been "Way Maker" by Leeland, according to a source familiar with the campaign.

Ramaswamy had breakfast, worked out and played with his two sons Karthik and Arjun until he worked out again later, according to spokesperson and senior advisor Tricia McLaughlin. The tech entrepreneur also toured the Reagan Library, where he told reporters that he was “feeling good” ahead of the debate.

Haley's team shared the former ambassador’s playlist that she listened to before the debate. They include:

Trump maintains a lead of 33 percentage points over Haley, his nearest competitor in New Hampshire, according to the most recent polls. Haley appears to have benefitted the most from the first debate in the state, gaining 8 points compared to her average result on Aug. 23. No other candidate’s average has moved by more than 3 points, either up or down.

According to a September survey from the University of New Hampshire/CNN, only 36 percent of likely New Hampshire primary voters have definitely decided who they plan to vote for. Thirty-eight percent said they are leaning toward someone, and 24 percent said they are still trying to decide. Trump’s voters, however, were much more firm on their choice: Sixty-nine percent said they have definitely decided, compared with 31 percent for Ramaswamy and less than 20 percent for the other candidates.

When it comes to policy, New Hampshire Republican primary voters seem particularly concerned about economic issues, according to a September survey by NMB Research for the Competitiveness Coalition and the Josiah Bartlett Center for Public Policy. Given a list of issues that have been raised in the primary, 32 percent said the most important issue to them would be reducing federal budget deficits by cutting spending; 21 percent said it would be spending less on green energy by repealing parts of the Inflation Reduction Act; and 18 percent said it would be keeping taxes low. The only other issue to reach double-digit support was deploying the U.S. military to the Mexican border to stop illegal drugs from entering the country, which was named as most important by 19 percent of voters.

—Analysis by 538

We at 538 have been tracking how many days each candidate has spent campaigning in each state. And some interesting patterns have emerged:
Some candidates — like Ramaswamy and Haley — have really focused on retail politics, while others — like Trump and Scott — have held relatively few campaign events. (Perhaps their strategy is more reliant on TV ads.)>
Hutchinson, DeSantis and Pence have focused their campaigning on Iowa, whose culturally conservative and religious GOP electorate may be a good fit for their politics. By contrast, Christie and Hurd have focused their efforts on New Hampshire, whose large population of independent voters may be more receptive to their anti-Trump message.
The candidates are largely ignoring Nevada, even though it’s the third state on the primary calendar. Through Tuesday, the 10 major candidates have spent a total of 162 campaign days in Iowa and 124 in New Hampshire, but only four in Nevada!

—Analysis by Nathaniel Rakich of 538

Christie suggested that the government should refrain from regulating AI. Polling shows Republicans agree: when it comes to who should be responsible for providing solutions to AI-related issues, Republicans are more likely than Democrats to turn to companies and brands than to the government. In a July survey from Ipsos, Republicans preferred companies and brands over the government to be most responsible for creating or retaining local jobs by 29 percentage points, ensuring that AI doesn’t discriminate by 8 percentage points and ensuring AI provides accurate results by 14 percentage points. On protecting creators from unfair use of their work and preventing the spread of misinformation by AI, equal numbers of Republicans said that the government and companies should be most responsible.
—Analysis by 538