In reversing a conviction based on the desecration of an American flag, the Supreme Court of Pennsylvania has held the term "political demonstration" be given a broad interpretation.
Commonwealth v. Haugh, 439 Pa. 212, 266 A.2d 657 (1970).
Robert W. McClure,
Constitutional Law - Void for Vagueness - Political Demonstration,
Duq. L. Rev.
Available at: https://dsc.duq.edu/dlr/vol9/iss3/17