If Russia and China really wanted to subvert the national security of the United States, they would seek to plunge Washington into a completely new, open-ended war with no practical resolution in sight on another continent far away from either of them where the United States itself had absolutely no major strategic interests at all, apart from fantasies of domination and greed.
Such a war would also serve the purpose of burning up an increasing share of the defense budget that otherwise could be spent on modernizing the US armed forces.
Repeated congressional testimony over the past two years by Service chiefs confirms that these forces remain woefully aging and out of date despite record size defense budgets. This is testimony to the incompetence, corruption and sheer wastefulness of the military-industrial-congressional-complex (MICC).
Comment: Though there remains the likelihood that the US will invade Venezuela, it seems more 'up their alley' to intervene clandestinely, or indirectly by arming and/or funding an insurgency, similar to what they did in Syria.