That's Chris Edwards' view:
I managed to get through the introduction and first chapter of Mr. Chait’s book. Alas, I could read no more. Here are some of Chait’s characterizations of supply-side economists and supply-side economicsfrom the 1970s to the present dayin those first 44 pages:
“Pseudo-economists”, “cult of fanatical tax-cutters”, “amateurs and cranks”, “patently ludicrous ideas”, “preposterous ideas”, “theological opposition to taxation”, “ideological fanatics”, “insane”, “detachment from reality”, “extremism of their agenda”, “triumph of the extreme”, “a cult”, “quasi-religious”, “totalistic ideology”, “crank doctrine”, “sheer monomania”, “plain loopy”, “magical”, “sheer loons”, “deranged”, “wingnuttery”, “utterly deluded”, “crackpot economic theories”, “lunacy”, “ludicrous,” etc.
You get the idea.
Chait is a brutal polemicist at times. But accusing him of being on the same plane as Coulter is beyond the pale.