1968: Eugene McCarthy Benefit Shows

Paul Simon & Art Garfunkel joined the 1968 campaign of governor Eugene McCarthy, who was running for president that year.

As far as I know the following three dates, were the shows they did for that campaign:

1968-04-18 Palestra, University of Penssylvania (Eugene McCarthy Benefit)
1968-05-02 Indianapolis, USA, Coliseum (Eugene McCarthy Benefit)
1968-05-07 Indiana (Eugene McCarthy Benefit)

There might have been more. Simon & Garfunkel performed in various cities around the mentioned dates above as well. But to my knowledge so far, these were not connected to the McCarthy campaign.