The takeaway: Surveys from Gallup show that a steady percentage of American adults identify as Republicans. These data counter some academic theories that Donald Trump has driven partisans out of the Grand Old Party. On the other side of the political aisle, Democratic party identification has indeed increased. (Given their performance in the 2018 mid-terms, perhaps that’s not all too surprising.)
Still no evidence of a decline in Republican party identification since 2016
But Democrats are at their highest pre-election level since 2007, and doing significantly better versus 2015
