Almost 15,000 new emails sent from Hillary Clinton's private server when she was secretary of state are to be released in the days and weeks before the presidential election, a judge has ruled.

The decision comes as documents were separately published on Monday showing that the Clinton Foundation tried to secure favours for wealthy donors from Mrs Clinton's state department office.

A firewall was supposed to have been in place to ensure that the Foundation, which distributes hundreds of millions in funds domestically and overseas, remained completely separate from Mrs Clinton's role as America's top diplomat.