@Sturgis,
If you refuse to take facts seriously when I present them, that's your business. Denial of reality doesn't tend to lead to useful outcomes however.
But why does it matter whether I care about the ideology of the replacement party? My objection to the Democrats is not over their ideology, but over their unacceptable tactics.
Anyway, it is the nature of a two-party system that both parties will try to get about half of the voters. If the balance shifts so that one party always wins all the time, the losing party will modify their positions to attract more voters. Meanwhile the victorious party will move away from the center to try to fulfill some of their less-popular ideals, causing them to shed voters. It leads to a balance where both parties win about half of the time.
So the major parties ultimately do not decide their ideology. The American people decide what they support, and the major parties adopt whatever ideology is necessary to win those votes.
That means the best way to shift the ideology of the American government is not to try to get the politicians to change, but to convince the voters to change. If the voters change, the politicians will follow.