Via Tom Nelson, The Grateful Dead on why they support Obama:

Bob Weir, Phil Lesh, Bill Kreutzmann and Mickey Hart hit a Penn State University stage Monday night to play for about 15,000 people.
It was the quartet’s first show together since a 2004 reunion tour. Hart, Weir and Lesh had already jammed together in support of Obama in February in California.
Before his set Monday, Hart said in an interview backstage with The Associated Press that he was most impressed with Obama’s views on climate change.

If only Deadheads shared Obama’s concern on CO2 emissions:

Brian Cohen, 32, of Wolcott, Vt., drove 10 hours to catch the show. Cohen said he supports Obama but would have attended regardless.

I assume, in light of the tremendous concern over the environment, that all Dead shows are now smoke-free. . .