Not that I'm necessarily advocating this, but US intelligence has historically proven extremely adept at destabilizing regimes.

I'd imagine that mostly look like sowing internal discord within the CCP. The party already has a lot of corruption, so most likely many senior officials could be blackmailed and manipulated. The long-term goal would be to weaken the resolve and coherence of the CCP to the point that a non-violent democratic revolution could take place.

This is a quite short-sighted point of view. The real challenge is to establish a stable new regime after toppling the old one. In the case of mainland China that has no prior experience at all as a democratic society, it would have a difficult time adapting (PRC before WWII doesn't count since it was unstable and higly corrupt). Also, a weak goverment is in danger of neglecting to address the internal challenges China faces (tensions with minorities, poverty in rural regions, environmental destruction).

My guess is that US intelligence has several "shadow" arms that have morphed into their own creatures and are no longer the same patriotic beast it was during the cold war. I'm doubtful whether destabilizing China is a real possibility, in the "CIA in Latin America" sense.