The FBI's Philadelphia office wants help in identifying a person involved in two June incidents.
Pennsylvania's Josh Shapiro, Michigan's Gretchen Whitmer, Wisconsin' Tony Evers, New Mexico's Michelle Lujan Grisham, and Maine's Janet Mills made an appearance.
State College and Penn State served as a hotspot for political campaigns last week.
The tour was originally set to stop at the Acacia fraternity.
Ocasio-Cortez rallied for the campaign of Kamala Harris and Tim Walz at the State Theatre on Friday night.
The pair will appear at 8 p.m. at the Bryce Jordan Center.