In the US, it's relatively inexpensive to buy up radio and TV stations and newspapers in low population states, then flood the zone with must-run pieces aimed at manufacturing consent for a particular worldview. That delivers a voting majority of a minimum of 1 representative and exactly 2 senate primed to favor a particular set of values and political objectives. Doesn't even require cheating by racial gerrymandering. (Political gerrymandering was legalized by SCOTUS in the 2019 Rucho case.)