In raw numbers the "Gen X and younger" generations just absolutely leapfrogged over "Boomer and older."
An overall increase of 25.5 million votes from 2014. 86% (21.9m) of the increase came from Gen-X-and-younger.
pewresearch.org/fact-tank/2019…
willjordanborderline.wordpress.com/2017/12/02/the…