Since January, Americans’ party preferences have shifted dramatically in the Democratic Party’s direction. What had been a two-percentage-point Republican advantage in U.S. party identification and leaning has become an 11-point Democratic advantage, with more of that movement reflecting a loss in Republican identification and leaning (down eight points) than a gain in Democratic identification and leaning (up five points)…

Currently, half of U.S. adults identify as Democrats (32%) or are independents who lean toward the Democratic Party (18%). Meanwhile, 39% identify as Republicans (26%) or are Republican leaners (13%)…

The greatest movement occurred in June — likely because of increased attention to racial injustice that followed the death of George Floyd while in police custody on May 25, as well as increased U.S. struggles to contain the coronavirus spread.