Life expectancy, both sexes, at birth:
2013: hispanic 81.9 white 78.8 black 75.1
2016: hispanic 81.8 white 78.5 black 74.8
Delta: hispanic -0.1 white -0.3 black -0.3
I would say that the decline has affected blacks equally, but considering their lesser overall life expectancy this otherwise equal decline has a greater negative impact for blacks.
"We focus on non‐Hispanic whites because their mortality trends were particularly adverse in the last decade and differ from those of non‐Hispanic Blacks and Hispanics.
In contrast to non‐Hispanic whites, mortality has continued to decline among Hispanics and non‐Hispanic Blacks, although death rates remain substantially higher for Blacks than for whites (Harper, MacLehose, and Kaufman 2014; Murphy et al. 2017; Stein et al. 2017). The underlying mechanisms driving mortality trends for non‐Hispanic whites are fundamentally different from those driving trends for other racial/ethnic groups, as suggested by James and Cossman (2017)."
[0] https://onlinelibrary.wiley.com/doi/full/10.1111/padr.12249
I was specifically addressing the comment's statement that "The decline in U.S. life expectancy has disproportionately affected whites". The CDC report seems to disagree.
Specifically looking at declines: the highest white life expectancy is in 2012 and the highest black life expectancy occurred in 2014:
2012 white 78.9 years
2014 black 75.3 years
2016 white 78.5 (-0.4, a 0.51% decline)
2016 black 74.8 (-0.5, a 0.67% decline)
Black life expectancy appears to have declined more (an even bigger concern to me is the absolute disparity between white and black life expectancy).