OCTOBER TERM, 1975 Per Curiam 424 U. S. new party, may never be able to prove a substantial threat of harassment, however real that threat may be, because it would be required to come forward with witnesses who are too fearful to contribute but not too fearful to testify about their fear. A strict requirement that chill and harassment be directly attributable to the specific disclosure from which the exemption is sought would make the task even more difficult. We recognize that unduly strict requirements of proof could impose a heavy burden, but it does not follow that a blanket exemption for minor parties is necessary. Minor parties must be allowed sufficient flexibility in the proof of injury to assure a fair consideration of their claim. The evidence offered need show only a reasonable probability that the compelled disclosure of a party's contributors' names will subject them to threats, harassment, or reprisals from either Government officials or private parties. The proof may include, for example, specific evidence of past or present harassment of members due to their associational ties, or of harassment directed against the organization itself. A pattern of threats or specific manifestations of public hostility may be sufficient. New parties that have no history upon which to draw may be able to offer evidence of reprisals and threats directed against individuals or organizations holding similar views. Where it exists the type of chill and harassment identified in NAACP v. Alabama can be shown. We cannot assume that courts will be insensitive to similar showings when made in future cases. We therefore conclude that a blanket exemption is not required. C. Section 434 (e) Section 434 (e) requires "[e]very person (other than a political committee or candidate) who makes contribu-