No, Antitrust law was effectively neutered by the Chicago School and their agent Robert Bork.

https://www.theamericanconservative.com/robert-borks-america...

(BTW that source is right-wing and can hardly be said to be biased against Bork).

That's fascinating. Bork was denied being on the supreme court but his ideas shaped current antitrust laws. It feels a bit like the old Standard Oil argument: It's ok to have a huge market share so long as pricing for goods gets cheaper even if it hurts competition overall. *edited* for grammar.