(NewsNation) — NewsNation hosted the fourth Republican presidential primary debate, one that moderator Elizabeth Vargas says featured “specific questions” meant to have the candidates “debate each other.”

“That’s what a debate is for — candidates to really talk about the differences in their own policies,” Vargas said Thursday on “The Hill” while recapping the debate.

On the stage Wednesday night were four candidates: Florida Gov. Ron DeSantis, former South Carolina Gov. Nikki Haley, businessman Vivek Ramaswamy and former New Jersey Gov. Chris Christie.

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They were asked about their electability, the economy and the border, among a number of other issues.

The moderators sought to “pin them down” on where they stand.

“I had a whole series of questions on the southern border, the crisis on the border, because they’ve all talked super tough on this, but it’s not clear how realistic a lot of what they’re proposing actually is,” Vargas said.