2. An extremely conservative political discourse, with roots in America's only slightly odd take on liberalism. Now that liberalism is dead as a political project* (we're now quite close to the 100th anniversary of that, by the way) all political discourses that are rooted in it will inevitably be highly conservative in practice this.
That's an excellent point Sibboleth, that is mentioned rarely.
Liberalism is dead, it is effectively dead since universal male suffrage, because Liberalism has always been, and will always be, an ideology of educated owners.
I'd like to add just one point to the question of American conservatism,, that may sound banal but is important in my view: The wideness of the land.
Not only that class struggle has been avoided because workers could move to the west, but there is also the myth of "Frontier" and "manifest destiny" that helped developing a special culture.
To put it simple: A culture of driving big cars, gun ownership, individual freedom, strong opposition to federal government and anti-bureaucratism.