
Two very quick points looking at this from the perspective of bourgeois interests.
The first is the Liz Truss argument. I.e. What Trump has done is to short the market. The announcement leads to market turmoil and devaluation, and down in the dip the most short-termist sections of finance and commercial capital hoover up cheap assets which they can sell when stocks inevitably recover. Which depends on Trump rowing back on some tariffs, which seems likely given his erratic behaviour. Would some sections of capital be happy to see US capital as a whole take a hit for their profits? Absolutely. We saw some of their British counterparts do this two-and-a-half years ago during Truss's brief stint in Downing Street, so why not again? There are sections of American capital who are totally on board with libertarianism as a strategy for class politics. I.e. Blow up anything that amounts to a social or legal obligation on capital accumulation, even if it's against the interests of capital-in-general. Giving credence to this reading is the "idiotic" way the tariffs have been calculated, and to whom they've been applied - including uninhabited rocks in the middle of the ocean. The slap dash approach indicates a desire in engineering an outcome, not a serious policy orientation.
But supposing it is a serious turn away from global trade, what does the US stand to gain? It's worth remembering that capital is not unified, and there are competing perspectives within it regarding assumptions about the ways of the world, what policies are appropriate to it, and what strategies are best for advancing the interests of sections of business, and/or capital as a whole. For instance, Trump's slimy relationship to Vladimir Putin is entirely rational viewed in the context of this framework. I would suggest the tariffs are bound up with securing the oligarchical interest on the home front. While trade unionism is hardly in rude health across the sea, the street rebellions around Black Lives Matter and Palestinian Solidarity are read by hyper-class conscious oligarchs as trouble at t'mill; that something is shifting. The proxy for this is the elite's war on woke. They (rightly) discern that the take up of diversity and inclusion policies by big capital is a form of appeasement, of capital responding to the expectations and aspirations of labour rather than laying down the law. After all, how awful it is for business owners that workers resent their aptitudes and identities being used against them. It is a far sighted recognition that the becomings of immaterial labour presents a long-term threat to the stability of class relations. The development of so-called AI is one technique whose application is to head this off, but equally the reconstruction of the federal state as a decrepit do-nothing institution with no purpose beyond enforcing the power of the executive branch can also serve as capital's reply to this existential challenge, albeit one that is crude in its methods and brutal in its outcomes. Trump's new isolationism is a disengagement from US responsibilities and dependencies and is explicitly asserted in sovereigntist terms - Make America Great Again. But what the real consequence will be is not the much-promised economic renaissance, but the reconsolidation of the bourgeois power some class fractions feel is slipping away.