I thought you literally were paid to attend one a couple times.
I was involved in several presidential visits. None of them were rallies and I wasn’t anywhere near where the president spoke. One of them ended with a shoe being thrown at the president.
Oh no shit! I knew you’ve been security at some presidential things but I somehow missed you were working at THAT presidental thing. Cool!
For that one my entire contribution was standing at an intersection making sure no one came through. We didn’t find out about the shoe thing until later when we were eating midnight chow at the mess hall.
I’d go to a Harris one, just to add to her crowd size, and if I thought I could get some free swag. 
Plus Cory Booker (who was GREAT) and Amy Klobuchar. Klobuchar was in a backyard in New Hampshire.
I did see Cory Booker speak twice at non-partisan nominally non-political events. He is a truly outstanding and charismatic public speaker. That was without a teleprompter or even notes. It has surprised me that he hasn’t been able to get more traction on the national level. Sometimes the charisma doesn’t translate fully when seen on tv.