OK, first off we need many, many arrests of double voter snowbirds. Get the low-hanging fruit first and let the shock set in.
Amen. We have friends, who are retired military families. They live on the West Coast of Floriduh or in Arizona. For decades they been complaining about the NE and or NW liberal snowbirds voting in two places.
Out here on the West Coast, there is a migration every late Sept/the whole month of October of snow/rain birds leaving Portland and/or Seattle going down I5 to S. California or to Arizona. The double voters in that migration is massive.
Last, but not least, are the liberal college students voting in person in their University city and by mail in their home state.