Robert Mueller does not exonerate Donald Trump of obstruction of justice or find that he committed a crime, according to a Justice Department letter.

US president Donald Trump's former campaign chairman - who is accused of multiple financial crimes - has attacked the strength of the evidence against him, saying the case is "embellished".

Top White House aide Karl Rove has been told by US prosecutors he won’t be charged with any crimes in the investigation into the leak of a CIA officer’s identity, his lawyer said today.

NEW York Times reporter Judith Miller testified before a grand jury yesterday, ending her silence in the investigation into whether White House officials leaked the name of covert CIA operative Valerie Plame.