The Washington Post has an article on millennial attitudes to Trump, broken down by race/ethnicity. The results won’t surprise anybody who’s been paying even minimal attention. Other things equal, millennials are even more hostile to Trump than Americans in general. Of course, other things aren’t equal; as with the population at large, African-Americans most unfavorable to Trump, and whites are least so, though no group is favorable on balance.
What’s surprising, or at least depressing, is the contrarian framing of this as a counter-intuitive finding, against a starting point assumption that millennials should have uniform views. I can’t blame the author of this piece for taking this as the starting point; it’s taken as axiomatic in the vast output of generationalist cliches against which I’ve been waging a losing battle since the first millennials came of age in the year 2000.
Just to push the point a little bit further, this study only disaggregates millennials by race. If, in addition, you took account of the fact that millennials (on average) have more education, lower income and less attachment to religion than older Americans, you would probably find it impossible to derive statistically significant differences based on birth cohort.