As I typed a number of times over a number of years, there is a trend towards Republicans getting a greater percentage of the non White vote over time. But the reason for it is that the proportion of non Whites accounted for by Blacks has been declining. In 1976 Blacks were 81% of the non White vote. In 2020, Blacks were only 38% of the non White vote. Other non White groups do not vote as overwhelmingly Democrat as Blacks do so the percent non White vote going Republican has drifted upwards. But the net effect for Republicans has been negative because the overall proportion of voters accounted for by non Whites has increased dramatically. It was 11 percent in 1976. It was 33 percent in 2020.
I went ahead and looked adjusted the percent non White received by Republicans by election for composition. I held the percent Black, the percent Hispanic, percent Asian, and percent Other constant at the median for each group and plugged in percentages for how each group voted by year.
What the table shows is that the trend is towards Republicans getting a greater share of the non White vote as time goes on. You can apply a statistical test and show that it is a "statistically significant" positive trend. But when you adjust for the changing proportions of non White groups within the non White population overall, the trend disappears. There is very little variability. If you were to apply a statistical test it would not show a significant trend either way but the coefficient is negative instead of positive. Pretty much a constant situation.
Meanwhile, because of the increasing overall non White proportion, the last four elections have been the best for the Democrats in terms of how much of a net edge they get in the overall vote due to the non White vote. The net edge from the non White vote never exceeded 10 points during 1976 through 2004. During 2008 through 2020, it's been 17, 18, 16, and 15. The 17 and 18 were associated with Obama. I guess you could say it's good that it went down from 16 to 15 from Trump's first run to his second one. But when you look at it in those terms the only Republican candidates who did worse were the two that had to run against Obama.
The basic picture has not changed.
IMO, an overwhelming majority of Americans (i.e. liberals and moderates) would support most of those examples.
In 2019 they have Harris as the most liberal. Warren is tied for 25, about in the middle of the donks.