Murder-for-hire happens regularly. Corporate involvement is very unusual, but that might be colored by a greater ability to throw resources at the problem. Most murder-for hire prosecutions that make the news seem to have something in common - the protagonists were amateurish, typically motivated by personal grudges, and spent relatively small sums of money (<$10k), and hired relatively inept killers who did a sloppy job and were caught. In contrast, organized crime killings often go unsolved for long periods.
Why wouldn’t POTUS have journalists killed then?
One current candidate for that office has lawyers who argue a POTUS would be immune from prosecution for such acts.
Corporations get caught doing crime all of the time. The fact that no large corporation in contemporary America has ever been caught hiring a hitman to assassinate a former employee is a very good sign that unlike all the other crimes they DO get caught doing, this one has never actually happened.
Why wouldn’t POTUS have journalists killed then?
One current candidate for that office has lawyers who argue a POTUS would be immune from prosecution for such acts.