I forget but I was reading a study somewhere of white voters (black voters were consistent regardless of generation) that showed a sloping curve from generation to generation. The Greatest Generation tended to lean liberal because they had a memory of the great depression and FDR but then the Silents too young to remember that leaned conservative, older Boomers (born pre 53) obviously leaned liberal whereas the younger ones were more conservative Generation X more so before Millenials born in the 80s and early 90s were more liberal. I think that if that trend continues you might see some of the younger ones starting to lean libertarian-conservative again.
I know that when I was in high school the popular anti-establishment sentiment was associated with hating Bush and the neocons and a rebellious kid back then would naturally have leaned left yet I feel that today with Obama in the White House, that same type of kid pissed off about big brother among other things that same kid would be more likely to lean towards being a Paulite and those are the types that will vote in the GOP primaries for Rand Paul in 2016.
Could have been the "Pew Research Study of Voters by Generation"(not that exact title maybe but...) and what President the select group of voters grew up under(went to HS during that presidents tenure) and how they voted in future Presidential Elections.
Yeah I believe that this was it:
http://www.nytimes.com/interactive/2014/07/08/upshot/how-the-year-you-were-born-influences-your-politics.html?_r=0&abt=0002&abg=1