Overall across the USA, the wealthier a citizen is the more likely they are to vote Republican. At the 2016 Presidential election, only 41% of those earning less than $30,000 per year voted Republican (53% voted Democrat).
African Americans are much more likely to vote Democrat in most US elections. In the 2016 presidential election, 88% of African American voters voted Democrat. White voters are more likely to vote Republican (58% voted Republican in 2016)
The majority of Hispanics tend to vote Democrat. However, their support is more evenly split between the two parties than African American voters. This is because the Hispanic population is more diverse than the African American population and because African American communities forged strong links with the Democratic Party during the civil rights era.