民调显示美国人对“努力致富”失去信心！认为自己很有可能提高生活水平的受访者比例降至25%，创下自1987年有调查以来的最低

Group 1 - The proportion of respondents who believe they are likely to improve their standard of living has dropped to 25%, the lowest since the survey began in 1987 [1] - Over three-quarters of respondents express a lack of confidence that the next generation will have a better life than their own [1] - Nearly 70% of participants believe that the "American Dream," defined as achieving success through hard work, is no longer attainable or never was, marking the highest percentage in 15 years [1] Group 2 - The survey indicates that Republicans are less pessimistic compared to Democrats, reflecting a long-term trend of differing economic outlooks based on the party in power [1]