Corporations are not human, they are abstract constructs, formed at least in part to encourage investors by limiting their financial responsibility. They are conceived, birthed and raised, in an entirely different manner and for different reasons, than human beings. Therefore their right should be inferior to human citizens. This needs to be stated specifically in federal law.
Note:
Citizens United v. Federal Election Commission
Justice Stevens said, "At bottom, the Court's opinion is thus a rejection of the common sense of the American people, who have recognized a need to prevent corporations from undermining self government since the founding..."