The net effect was a 4.5 million-voter swing: Democrats shed about 2.1 million registrants, while Republicans gained 2.4 million.
Even in states long considered reliably Democratic, the erosion has been evident. California, one of the largest blue states where voters declare party affiliation, saw significant Democratic losses.
Still, the available numbers show a dramatic narrowing of the Democratic advantage. In the 30 states and Washington, D.C., that require voters to register by party, Democrats’ 11-point lead over Republicans in 2020 fell to just over six points in 2024. Continue reading…