Wow. Vance lends a supportive blurb to a book that says that democracy is a failure and needs to be replaced by an authoritarian regime. This is nakedly un-American. I can't believe anyone who isn't an extremist can support that. But extremism is mainstream on the right now, and this blurb is an example of how those on the right are no longer paying any price for saying the quiet things out loud, and the overton window for this kind of talk is continuing to shift.
And as evidence for how little truth means on the right, a common refrain at Trump rallies is that voting to keep the left in power will spell the end of democracy. They are in the business of saying whatever people want to hear and planting ideas that spread hatred and division, in order to attain and stay in power. That exists on the extreme left too, but again, it's not mainstream.