I speculate it's now at the level which voted for Hillary. A slight majority of the population. But, when these people are hit in the face with the reality of what that means, ie Seattle, NYC, Chicago, and other progressive bastions, they are now not so enthusiastic. The trend is now they are leaning towards many of the things republicans and conservatives tout when they suddenly realize they are abandoned by their former "beloved" liberal/progressive leaders: individualism, self-determination and self-reliance. Only the most dedicated ideologues continue the stampede towards the cliff of totalitarianism.
This doesn't mean they like Trump. In spite the fact of them doing and feeling exactly what Trump says in his speeches. They are starting to realize that perhaps they hate the messenger, but now are hearing the message.
The "resistance" is largely comprised of three main groups: the leadership, ie the elected officials and elite which will be at the pinnacle of power if the system is implemented; the militant wing, BLM, Redneck Revolt, John Brown Gun Club, ANTIFAggot, Blac Bloc, etc these are your storm troopers to quell any resistance with firearms or other forms of violence, they secure the parameter of any "seized" or "won" territory; and of course the overwhelming majority which doesn't partake in the militant stuff but only agrees with it in part or perhaps in whole the political aspect. It is the largest body which is deteriorating because they are directly suffering. It's to the point where they are seeing first hand that the "utopia" they want is at best, the same as the old system and in many aspects far worse.