From Gallup:

Democrats’ advantage in party identification continues to dwindle this year. Fewer Americans identify as Democrats, and more say they don’t identify with or lean toward either party. On a state-by-state level, this means more states are now classified as competitive or leaning/solidly Republican than has been the case over the past two years, and fewer as leaning/solidly Democratic.

Some shift toward independent party identification is to be expected in the years between presidential elections; in presidential election years, party allegiance tends to be at its height. The key finding at this juncture is that Democrats, not Republicans, have been the net losers as Americans shift away from the major parties.

The overall result is a more competitive partisan environment this year than has been the case in the last two years, underscoring the potential for Republicans to do well and pick up seats in this year’s midterm elections.

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