A corporation is not a person and can be regulated
The rights protected by the Constitution of the United States are the rights of natural persons only. Artificial entities, such as corporations, limited liability companies, and other entities, established by the laws of any State, the United States, or any foreign state shall have no rights under this Constitution and are subject to regulation by the People, through Federal, State, or local law. The privileges of artificial entities shall be determined by the People, through Federal, State, or local law, and shall not be construed to be inherent or inalienable.
Money is not speech and can be regulated
Federal, State and local government shall regulate, limit, or prohibit contributions and expenditures, including a candidate’s own contributions and expenditures, for the purpose of influencing in any way the election of any candidate for public office or any ballot measure. Federal, State and local government shall require that any permissible contributions and expenditures be publicly disclosed. The judiciary shall not construe the spending of money to influence elections to be speech under the First Amendment.
Nothing contained in this amendment shall be construed to abridge the freedom of the press.