Demographic Factors and Universal Healthcare Support

In the context of public opinion regarding healthcare policy in the United States, data from a recent survey indicates that 65% of respondents support universal healthcare, while 25% oppose it. The remaining 10% are undecided. Based on this data and your understanding of public opinion and political behavior, explain the potential causal relationship between demographic factors (such as age, income level, and education) and public support for universal healthcare.

Your response should analyze how different demographic factors may contribute to an individual's stance on universal healthcare and provide specific examples to illustrate these causal relationships.