Washington: A group of cybersecurity, national security and legal experts is warning that Russia's efforts to weaken America's democratic institutions aren't limited to elections - but also extend to the US justice system.

"While we all focused on the electoral system, I think this disinformation effort is organised to really attack any of the pillars of democracy," Elizabeth Rindskopf Parker, a former general counsel at the National Security Agency and the CIA, said.

Russia's digital campaign to influence the 2016 US presidential race in favour of President Donald Trump put election security in the national spotlight. Credit:AP

"And when you think of the system that is the most highly regarded among the three branches of government, it is the court system. If you were installed in the position of a Russian disinformation planner, wouldn't you want to erode that?"

Russia's digital campaign to influence the 2016 presidential race in favour of President Donald Trump put election security in the national spotlight, resulted in congressional investigations and prompted lawmakers on Capitol Hill to set aside federal funding for states to strengthen their election systems.