Abuse of Power - Plain and simple. The President repeatedly misuses his position for corrupt purposes. His attempt to block a merger between Time Warner and AT&T had nothing to do with anti-trust policy, but because Time Warner owns CNN. In another instance, Trump berated his Postmaster General to arbitrarily raise the mailing rates on Amazon packages for no reason other than Amazon is owned by Bezos who also owns the Washington Post. This "Businessman-President" actively attacking businesses purely for spite, for connected entities exercising the First Amendment Right of a Free Press. This is not acceptable. This is not normal. It is an embarrassment that too many people support this buffoon who clearly has no redeeming qualities to hold the position that he holds.
BTW Nixon had an enemies list for which he too attempted to use the levers of government to attack. It was Article II in the Articles of Impeachment - "repeatedly engaged in conduct violating the constitutional rights of citizens, impairing the due and proper administration of justice and the conduct of lawful inquiries, or contravening the laws governing agencies of the executive branch and the purposes of these agencies."