An influential Tory MP says Australia and the UK must lead global efforts to combat Russian and Chinese interference in western democracies because the investigation into Russian meddling has neutered the Trump White House's ability to lead on the issue.

Conservative MP Bob Seely raised the matter with Foreign Minister Julie Bishop in London this week.

Writing exclusively for Fairfax Media, Mr Seely, who has just been elected to the British parliament's prestigious foreign affairs committee, said the Mueller investigation would only get worse for Mr Trump, diverting the US' ability to deal with threat of foreign interference.

"Things will soon worsen for the US president: watch this space. The battle to save his presidency will become all-consuming.

"The fallout will undermine the bipartisan approach," he said.