Makes no sense at all.
If President Obama does not ask them to do a benefit in San Francisco during the primary's, they would not have done a benefit for President Obama during the presidential elections in PA. If those two events had not occurred then they would not have toured. In fact if the benefits had not gone well then the Dead tour would not have toured. Which led to Phil and Bobby forming Furthur.
A lot of thinks had to happen. I am glad Obama made the call. That is why I made the comment that stickers should be everywhere. Just a joke, sort of. All this is pretty well documented in Rolling Stone and Relix. By the way Rolling Stone does a pretty good job of mixing music and politics.