Corporations are taxed, they are fined, they are regulated, they are sometimes put out of business by the government.  Corporations are sometimes successful, they are sometimes unsuccessful. They are taxed as a private entity as would an individual. Corporations do have Constitutional rights (especially the 1st, 4th, 5th, 6th, 8th and 9th Amendments and the Commerce Clause). Other than taxes (which are more onerous for corporations), corporations operate under the same rules as partnerships or individuals. So to claim corporations do not have rights is dangerously selective application of law. To claim that corporations should not have the right to make political contributions opens the door to demanding the same of labor unions, PACS and similar issue oriented groups.