The US House of Representatives has  called for Special Counsel Robert Mueller's upcoming report on his probe into Russia's role in the 2016 election, to be released to Congress and the public.

The 420-0 House vote, with four conservative Republican lawmakers voting "present," gave Democrats who control the chamber a political victory and put pressure on Attorney General William Barr to make the report public after Mueller submits it to him.

Mueller has been investigating since May 2017 whether Trump's campaign conspired with Moscow and whether the president has unlawfully tried to obstruct the probe.

Justice Department regulations governing special counsels gives the Attorney General reach in deciding how much of the report to make public.