According to Techdirt, President Trump has banned CNN from some form of access and then directed the Department of Justice to investigate the network for not covering him. The report frames this as a government-backed variation on a tactic previously used by Elon Musk, who told advertisers to leave his platform and then sued them for boycotting.
The source does not provide additional details on the scope of the ban or the legal basis for the DOJ probe. It notes that Musk's own lawsuit was unsuccessful, and suggests Trump's approach may be similarly abusive but with the added weight of state power.
Because there is only one source, the article cannot corroborate the specifics. The key point is that the report alleges a direct link between a presidential ban and a federal investigation into a news outlet's editorial decisions.