California mailed ballots to every registered voter, both elections.

2024: 43.8% voter turnout 9,906,135+ votes (Trump 4,022,884 v D 5,749,208)

2020: 80.67% voter turnout 17,117,157+ votes (Trump 6,006,518 v D 11,110,639)

A difference of 2 million for Trump and 5.3 million for Dickbutts.

Mayhaps 7+ million voters and their families moved out of California since 2020, or it was something else.