Former Republican Speaker Newt Gingrich (Ga.) on Sunday said he thinks that presumptive GOP presidential nominee Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE will not make a decision about a running mate until just before the convention.

"He's probably going to start thinking about it about two days before Cleveland," Gingrich said on "Fox News Sunday."

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"I think Donald Trump does not want to make a decision until the convention. I think that he's a very decisive person."

Gingrich, who has been discussed as a potential running mate for the candidate, said nobody had mentioned anything to him about whether or not he is being vetted.

"Nobody has called me. Nobody has said would you like to be. Nobody has said, 'Would you be willing to be considered?' " he said.

"Nobody has said anything."

But Gingrich said that in his case — and in the case of a few others — there's not much vetting to do.

"I mean, you guys have been all over me for a decade," he said.

"It's all out, all you got to do is Google."