Maguire: Whistleblower complaint over Trump’s Ukraine call was credible

The acting director of US national intelligence, Joseph Maguire, says the whistleblower report over President Donald Trump's call with Ukraine's leader Volodymyr Zelenskiy was credible.

The complaint details a call between Mr Trump and Ukraine's president in which Mr Trump asks Mr Zelenskiy to investigate Democrat political rival Joe Biden.

Mr Trump denies any wrongdoing.