John Marshall Harlan II,
Cammarano v. United States — Opinion of the Court
“ Petitioners are not being denied a tax deduction because they engage in constitutionally protected activities, but are simply being required to pay for those activities entirely out of their own pockets, as everyone else engaging in similar activities is required to do under the provisions of the Internal Revenue Code. Nondiscriminatory denial of deduction from gross income to sums expended to promote or defeat legislation is plainly not "aimed at the suppression of dangerous ideas." ”
