Nice of them to let us know:

Second, I’d like to talk a little about the Santorum Social security event that I attended today. It was quite eventful and well attended, although I am pretty sure it was well attended because around six or seven different activist organizations had turned out in force. Outside the hall before the event, Philly DFA began chanting “Hey-hey, ho-ho, Riock Santorum has got to go!” Local college Republicans, who are just about the only Republicans in West Philly, responded with a chant that beautifully was captured live by CNN: “hey-hey, ho-ho, Social Security has got to go!” I love it when the other side does your campaigning for you!

Video here.