Anti-Trust is not magic, its no longer a tool politicans can wield like a club against things they don't like. The courts have a definition and you actually have to prove abuse for those law-suits to do anything. Doing so if you can do it at all takes decades.

Unless politicians make major changes to the anti-trust law its unlikely to be effective. And doing so would require major action in congress.

The president could use non anti-trust actions as well of course. But rather unlikely.