Well, the NY Times was showing a 12% shift to Trump (compared to 2016) for non-Cuban Latino voters. The shift in African American districts to Trump was smaller (2.5-3%) but still measurable.
Further, with a small (1.5%) shift of seniors away from Trump, that means that Trump has most likely dug into the left's millenial majority to some extent. Be interesting when the numbers actually come out.
Reality is that Trump has built a GOP coalition of working people and its traditional base which is far more diverse than the media wants to admit.