Former US president Bill Clinton has compared himself and his charity The Clinton Foundation to Robin Hood without the stealing.

The husband of Democrat presidential nominee Hillary Clinton defended himself as he told the Ohio crowd about the Republican Party's recent attacks on the charitable organisation.

"They even went after my foundation last week. Now that was really funny," Clinton said at a Labor Day picnic in Cincinnati, Ohio. "I was sort of Robin Hood, except I didn't rob anybody. I just asked people with money to give it to people who didn't have money."

The GOP had lashed out at the Clinton Foundation for the close relationship it maintained during Hillary Clinton's time as Secretary of State, with Trump's senior communications adviser Jason Miller telling The Hill: ""There's nothing funny about the growing evidence of corruption and conflicts of interest between the Clinton Foundation and Hillary Clinton's State Department.

He added: "The fact that a Hillary Clinton presidency would be compromised by tens of millions of dollars in foreign donations to the Clinton Foundation is no laughing matter either – it is downright terrifying."

Despite Bill Clinton confirming the foundation would no longer receive corporate donations should his wife win the election, and stating that he would step down from his role with the foundation in such a case, Hillary Clinton drew criticism from Republicans after stating there was no reason for Bill to step down until after November.

Clinton's daughter Chelsea is expected to retain a role at the foundation regardless of the outcome of the presidential election.