Trump says Clinton too tough on Putin

Donald Trump has criticised Democratic rival Hillary Clinton for being too tough on Russian President Vladimir Putin.

Speaking at a rally in Springfield, Ohio, on Thursday the Republican nominee took issue with Clinton's criticism of the Russian strongman, who has been denounced for his military assertiveness and anti-democratic tendencies.

Trump said: "She speaks very badly of Putin, and I don't think that's smart."

He asked: "How do you speak so badly of someone?"

Trump has been repeatedly criticised for failing to denounce the Russian leader and saying that he'd be willing to work with him to fight Islamic State militants.

Trump is also continuing to criticise Clinton's judgment and stamina, saying "she's definitely a low-energy person."

Meanwhile Trump is seizing on revelations in hacked emails that show the overlapping relationships between the Clinton Foundation and the family's private enrichment.

He's referred to a 2011 memo from longtime Bill Clinton aide Doug Band contained in Clinton campaign chairman John Podesta's private emails.

Band described how he encouraged his clients to contribute to the Clinton Foundation and hire Clinton for consulting and speaking gigs.

Trump said: "If the Clintons were willing to play this fast and loose with their enterprise when they weren't in the White House, just imagine what they'll do," if they return.