A CNN review of current state voter-registration rolls finds Democrats have shed about 2.1 million registrants since 2021 while Republicans have added roughly 2.4 million, giving the GOP a 4.5 million-voter advantage—its strongest position in more than two decades. The gains are especially pronounced in presidential battlegrounds: Republican registration outpaces Democrats by 8 percentage points in both Pennsylvania and North Carolina, 6 points in Nevada and 3 points in Arizona. The voter-registration shift deepens the structural challenges identified in a New York Times analysis of forthcoming census reapportionment. Using population projections for 2030, the newspaper estimates Republican-leaning states would gain seven U.S. House seats—and the same number of Electoral College votes—led by Texas (+3) and Florida (+2). Democratic strongholds such as California, Illinois and New York are projected to lose seats, and some demographers say the net swing could reach 14 seats, further tilting the presidential map and congressional balance toward the GOP unless Democrats reverse recent registration and population trends.