Republicans used to have some semblance of ideology that you could kinda count on them sticking to occasionally... ish. That's all gone now. It doesn't even matter what they said 5 minutes ago, hate big tech?, next thing you know they hand big tech the purse strings of government.
The writing has been on the wall demographically for decades. Their base has been shrinking, fewer people are religious, white folk are losing status. It’s become harder and harder to win an election for turn since GW Bush, and even that went down to the courts.
Many districts are only red due to blatant gerrymandering. But even that gets harder to wield so what seems to have happened is that while they still can ostensibly win an election, they crank the wheel and destroy the rules so that they never have to compete on a level field again