Gallup Poll Shows Largest Increase in, Democratic Party Affiliation in a Decade.br According to a Gallup report released br on April 7, an average of 49 percent br of people age 18 and older...br ... had a Democratic Party affiliation br or Democratic leanings throughout br the first quarter of 2021.br 40 percent of those who responded identified themselves as Republicans or having Republican-leanings.br The 9 percent difference br is the largest gap since br the fourth quarter of 2012.br Our data on this only goes br back to the '90s, but it's br pretty much the only time.., Gallup senior editor Jeff Jones, via 'USA Today'.br ...