26 U.S. Code § 271 - Debts owed by political parties, etc.
In the case of a taxpayer (other than a bank as defined in section 581) no deduction shall be allowed under section 166 (relating to bad debts) or under section 165(g) (relating to worthlessness of securities) by reason of the worthlessness of any debt owed by a political party.
For purposes of paragraph (1)(C), the term “contributions” includes a gift, subscription, loan, advance, or deposit, of money, or anything of value, and includes a contract, promise, or agreement to make a contribution, whether or not legally enforceable.
1976—Subsec. (c). Pub. L. 94–455 added subsec. (c).