Clinton is reportedly telling friends and associates that she "hasn't closed the doors on a third presidential bid" after losing the 2008 Democratic primary to Barack Obama and then the 2016 presidential election to President Trump in one of the most spectacular upsets in the history of US politics.

Hillary Clinton may not be ready to give up on her Oval Office dreams, CNN's Jeff Zeleny reports.

"Clinton is telling people that she's not closing the doors to the idea of running in 2020," Zeleny said. "I'm told by three people that as recently as this week, she was telling people that look, given all this news from the indictments, particularly the Roger Stone indictment, she talked to several people, saying 'look, I'm not closing the doors to this.'"

Of course, this doesn't mean that there's a "campaign-in-waiting" for Clinton, but it appears some low-level work is already being done to refurbish the Clinton machine.