The political landscape in the United States is heavily influenced by demographic factors such as age, race, ethnicity, and socioeconomic status. Recent studies show that different demographic groups tend to have distinctive political ideologies and preferences. For example, young voters, often characterized by their progressive views on social issues, participate in elections with varying levels of enthusiasm compared to older voters, who may have more conservative leanings. Given this context, which of the following demographic factors is most commonly associated with stronger support for progressive political ideologies in recent elections?