Although Gibson doesn't exactly strike me as a MAGA guy in real life, it is interesting to note that in the story, the "real" Earth timeline is one in which it's implied that Hillary Clinton won the 2016 election (neither "Clinton" or "Trump" are mentioned by name anywhere in the book).  However, it's also the timeline in which a global thermonuclear war erupted around the Syrian conflict.

It is this outcome which the protagonists, some of which are covert operatives from our future, are seeking to nudge the other stubs away from. In other words, it's classic William Gibson, who's enduring quip "The future is here, it's just unevenly distributed" has probably garnered even more relevance of late.

In one of the early stubs, it is Trump who won the 2016 election, and although no nuclear conflagration occurred then, a series of rolling catastrophes remembered by history as The Jackpot, ensued. The Jackpot resulted in massive depopulation, the destruction of democracy globally, and a system of interlocking fiefdoms run by a new governance structure openly acknowledged to be a kleptocracy.