Denial of deduction where contribution for lobbying activities

No deduction shall be allowed under this section for a contribution to an organization which conducts activities to which section 162(e)(1) applies on matters of direct financial interest to the donor’s trade or business, if a principal purpose of the contribution was to avoid Federal income tax by securing a deduction for such activities under this section which would be disallowed by reason of section 162(e) if the donor had conducted such activities directly. No deduction shall be allowed under section 162(a) for any amount for which a deduction is disallowed under the preceding sentence.