There's a developing rift between younger and older black voters that could affect the 2020 presidential race and beyond. CNN: Overall, our last three CNN polls have Biden at 44% among black voters. No one else is anywhere close; Harris is in second at 14%. Biden's big league advantage in these polls is similar to the Fox News poll. However, Biden's standing drops to 36% among black voters under the age of 50. This is lower than the 51% he has among black voters aged 50 and older. This is not to suggest younger black voters would vote for Trump...