A majority of Americans agree that the unequal distribution of income and opportunity in the U.S. has gotten to be too much.

Economic inequality in the U.S. is rising. It has increased exponentially since the 1980s, according to a new Pew Research Center report on the topic. In 1980, the households that ranked in the top 10% of earners had about nine times the income as those in the bottom 10% of earners. In 2018, the top 10% of earners had about 12.6 times more than households at the bottom. That's a 39% increase, according to Pew.

Those demographic changes have become a rallying cry for several politicians seeking the Democratic presidential nomination, so it's no surprise that more Democrats see this as a major issue than Republicans. About 78% of those who identify as Democrats say there's too much economic inequality, while about 41% of Republicans agree, according to the Pew Research Center survey.

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Younger Americans are also more likely to agree: 71% of those 18 to 29 say there is too much economic inequality in the U.S. today, compared to just 52% of those over 65. It's worth noting, however, that millennials and Gen Z also are more likely to identify as Democrats, Ruth Igienik, a senior researcher at Pew, tells CNBC Make It.

Among Republicans, 58% of younger voters in the party more likely to say there's too much economic inequality compared to just 28% of older members. As expected, there's not a significant difference in viewpoints among Democrats when broken down by age, Igienik adds.