The 12 July 2017 Reunions issue of PAW contains, beginning on page 32, a story about the presence of political issues during the event, with some attention given to PPro’s fostering the wearing of pussyhats during the reunion, including a large picture of a PPro Board member wearing one.
The brief text says the following:
Some alums marched in the P-rade wearing the pink “pussy hats” popularized during women’s marches protesting the agenda of President Trump. Princeton Progressives, a group of alumni that supports progressive student activity, brought the pink hats for alumni to wear.
Also mentioned were the black-and-orange hats of The TiGrrrHat Project (discussed further in the Class Notes for 1982), proceeds from which were donated to student groups.