China and Russia are engaged in authoritarian attempts to subvert and change the rules of the international order, according to one expert. The attempt, they say, can only be thwarted by a united effort of the world’s democratic nations. “China and Russia are authoritarian states that see themselves constrained, encircled, and threatened by the liberal democracies led by the United States,” said Aaron Friedberg, a visiting senior fellow at The German Marshall Fund of the United States. “They’re attempting, both separately and in concert, to change important aspects of the existing international order. They are revisionist powers. The challenge they pose is collective and requires a collective response.” Friedberg made the comments during a Jan. 19 webinar hosted by the German Marshall Fund of the United States, a think tank that seeks to promote cooperation between North American and European nations. The comments come amid an increasing fear that Russia …