NEW: To mark 20 years of the Pew Research Center, we took a look back at some of the biggest changes in US public opinion during that time. Of note: Complete reversals on same-sex marriage and marijuana legalization, and the emergence of China as a perceived threat.
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How U.S. Public Opinion Has Changed in 20 Years of Our Surveys
We took a closer look at how Americans’ views and experiences have evolved on a variety of topics over the last 20 years.
