US president Donald Trump is "in excellent health", according to a White House doctor who performed a routine medical.

Hillary Clinton is pushing her supporters to cast early ballots in key battleground states in the race for the White House, as Donald Trump tries to make up ground with intensified attacks following the FBI's renewed examination of her email practices.

Barack Obama gave a speech to rapturous applause in Berlin today where he told the gathered crowds that "now is our moment" as he touched on subjects such as nuclear weapons and climate change.