@blatham,
There's another aspect to the above that I've been thinking about lately. That is the deeply ironic claims by conservatives that they represent the true or proper face of American "sovereignty".
For example, consider the common conservative rejection of the idea that American jurisprudence should be informed by the modern jurisprudence of other nations or international bodies (ie World Court). Scalia was just one robust voice against such influence. A theory of sovereignty was his main argument.
Likewise, the common conservative (and neoconservative) rejection the notion that the US ought to consider itself one of a community of nations who are (or might be) bound by treaties which curtail certain activities, eg torture, use of the seas, specific types of involvement with other nations, etc. Again, the arguments advanced lean on notions or claims about US sovereignty (usually accompanied by notions/claims about US "exceptionalism").
One key observation we can make in all of the above is that such notions, claims and values seem to arise as a supportive framework for US corporate activities outside the US. Certainly, that is the main use.
I think there are two main ironies here, one traditional and the second quite contemporary. The traditional irony is the common dismissal of other nations' sovereignty (because America is exceptional in some convenient manner for the case, because, say, it defends the world from potential oppressors). The US can go in, muck about in ways which the US would NEVER allow to be done to itself, and that seems to be OK.
The contemporary irony is Russia's involvement in the last election and its continuing activities towards American (and European) societies and politics. To safeguard the present arrangement of political power in the US, Republican politicians are (the majority of them though not all) are rising in defense of the Trump administration through defense of Putin and Russian incursion that would have been just a year or two ago totally inconceivable. It would have been inconceivable because of the Republican notions of sovereignty.
PS... At this point I'm uncertain how much more I'll write here about politics in the US. As I said earlier, studying the modern GOP and modern US conservatism can get quite depressing because of the pervasive and deep levels of corruption - financial, ideological and moral. I do come away feeling like I am covered in ****.