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Former President Trump revealed his criteria for a running mate on Sunday, but he told Fox News host Maria Bartiromo that he won't announce a vice presidential pick "for a little while."

Trump made the comments in an interview with Bartiromo that aired on "Sunday Morning Futures." He said the most important factor is to ensure his running mate would be able to step up and handle the presidency in the case of an emergency.

"What criteria are you using to identify who your running mate is?" Bartiromo asked.

"Always, it's got to be who is going to be a good president. Obviously, you always have to think that because in case of emergency. Things happen, right? No matter who you are, things happen. That's got to be No. 1," Trump said.

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Former President Donald Trump in New Hampshire

Former President Trump told Fox News host Maria Bartiromo he won't announce a vice presidential pick "for a little while." (Brandon Bell/Getty Images/File)

"Who is your running mate?" Bartiromo said.

"Well, I have a lot of good people. I have a lot of good ideas," he added, saying he "talks to everybody."

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"You know, I called [South Carolina Sen.] Tim Scott and people like Tim Scott, and I said you're a much better candidate for me than you are for yourself," Trump said. "When I watched him, he was fine. He was good, but he was very low-key."

Sen. Tim Scott of South Carolina in New Hampshire

Trump says Sen. Tim Scott, R-S.C., is a better advocate for the Trump campaign than he was even for his own presidential campaign. (Fox News/Paul Steinhauser)

"I watched him in the last week, defending me and sticking up for me and fighting for me. I said, 'Man, you're a much better person for me than you are for yourself,'" he continued.

Trump went on to praise South Dakota Gov. Kristi Noem as well, noting that she said publicly that she would never run against him "because I could never beat him."

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Former President Donald Trump

Former President Trump (Michael M. Santiago/Getty Images)

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Trump denied reports that his campaign reached out to independent presidential candidate Robert F. Kennedy Jr. to explore a potential ticket with him early on in the campaign season. Trump said the interaction "never happened."