Which state is the heart and soul of the Democratic/Republican Party?

[Senator Incitatus]

Certainly the heart and soul of a party is where most of its voters are as a percentage of the national party, not where the state has most of the local voters. Wyoming has no influence on the national party (except insofar as its only Rep is has some personal influence as Dick Cheney's daughter) and neither do most Plains states.

For Republicans, it would probably be Texas, Ohio/Pennsylvania, or Florida – the three states where Trump got the most raw votes and carried the state. I'd say Texas but Florida is clearly the ascendant state party in terms of national influence.

For Democrats, California or New York of course.