I have a better question. How do the self described hippies of the late 60s and early 70s vote now? My guess is about evenly split today. Hippies were drawn to progressive causes and I expect a lot of them to still think that way. But at the same time I think a lot of them were just going through a rebellious phase and turned more conservative by the late 70s.
1968: 10/60/30 Nixon/Humphrey/None
1972: 10/90 Nixon/McGovern
1976: 30/60/10 Ford/Carter/None
1980: 30/40/15/15 Reagan/Carter/Anderson/None
1984: 50/50 Reagan/Mondale
1988: 45/55 Bush/Dukakis
1992: 30/40/30 Bush/Clinton/Perot
1996: 35/50/15 Dole/Clinton/Perot
2000: 50/50 Bush/Gore
2004: 55/45 Bush/Kerry (first time the R wins this group)
2008: 50/50 McCain/Obama
2012: 55/40/5 Romney/Obama/None
A few turned Republican (Norm Coleman is a notable example) but to nowhere near this degree. Romney didn't even win 45-64 year olds as a whole by this margin, and ex-hippies would certainly be at least somewhere more Democratic than their age cohort. It's important to get beyond generalisations like "Boomers were hippies" and now "Boomers are conservative". These are (mostly) not the same people! There were a significant number of young conservative Boomers (e.g. Mitt Romney) who would tend to be disproportionately Republican today, and there are still a significant number of Boomer liberals today.
I suspect a large majority became relatively mainstream Democrats. I'm guessing they voted about 75/20/5 for D/R/other in 2012. However they possibly voted up to 20% for Nader in 2000.
