Not sure if you're being rhetorical, but asking if Trump is a cause or a symptom is akin to asking whether heroin addiction is a cause or a symptom. The answer is yes. Godry is correct that the GOP has basically been rotting since the end of the Cold War. They've tried to cram the square pegs that are "against terrorism" and "against taxes" into the round hole of "against communism" but it's just not fitting right. Lubricated by a thick layer of KFC grease, Trump has been able to squeeze himself into a hole he didn't have much to do with creating, but damn if he isn't splitting it wide open.
Did you see that viral video of Bernie Sanders eviscerating Steve Mnuchin? It's a thing to behold, because Mnuchin is left almost speechless, but he sits there with the smug look of someone who doesn't give a shit about being wrong because he knows that there isn't a logical rip in space-time big enough to make the GOP give a shit how bad his tax bill is. They've reached critical mass, and the light and heat from their bullshit can no longer escape orbit, and thus it's turning in on itself. Competence surely isn't an asset, because any attempts to compute 'A' and 'not A' simultaneously break logic machines. Only a guy who claims that the Constitution is Christian scripture can compute this logic. Thus the ascendancy of fictional hyperboles like Roy Moore makes sense.
"Terror Babies!" "Death Panels!" "Job Creators!" It's difficult to not sense that the mountains of horseshit that they've been shoveling for the past quarter century aren't beginning to decay. Hopefully it decays into fertilizer and doesn't cause a cholera epidemic. One of the upsides of Trump being elected is the awakening on sexual harassment. I don't think that without "grab 'em by the pussy" that we'd have people like Glenn Thrush and Charlie Rose being suspended. Harassment is no longer something creeps from the other side do; it took someone as disgusting as Trump to make us recognize that. I hope he'll have a similar effect in other areas (racism, classism, etc.).
Trump is a symptom and a disease, and he's finally convincing us to make that doctor's appointment we've been putting off for too long. If his tax bill keeps getting this level of criticism (even the most generous estimates say it costs $1 trillion), there's a good chance that will collapse, too. Maybe at that point Godry will start to be taken seriously by his fellow conservatives.