Florida Gov. Ron DeSantis, a rising Republican star, has been careful not to nurture growing speculation that he will make a presidential bid in 2024. He has brushed off questions about his political ambitions, while the party's presumptive front-runner, Donald Trump, repeatedly hints he will run again.

But there are signs that DeSantis could be preparing for a White House run even as he campaigns for another term as governor in November's midterm elections.

A Reuters analysis of DeSantis' social media ads shows he has dramatically expanded his out-of-state ads in recent months, an indicator, say some political analysts, that he may be laying the groundwork for a national campaign.